AS-568 USA Standard O-ring Size Chart

AS-568 Standard O-ring Size Chart is an American National Standards Institute (ANSI) standard for O-Ring sizes developed by the Rubber Manufacturers Association (now the Rubber Industry Association). The AS-568 standard defines a series of standardized O-Ring sizes for a variety of industrial and commercial applications, particularly in aerospace, automotive, hydraulic and pneumatic systems.

Key features and elements of the AS-568 standard include:

Range of sizes: The AS-568 standard covers a range of O-ring sizes from small to large, including inside diameter (ID) and cross-sectional diameter (CS). These sizes are suitable for different pressure and temperature conditions.

Numbering System: Each O-ring in the AS-568 standard has a specific three-digit number that corresponds to its size. For example, the number 340 usually indicates a specific combination of inside and cross-section diameters.

Material Type: Although the AS-568 standard focuses primarily on the size of the O-ring, it usually mentions the type of material that is applicable, such as Nitrile Rubber (NBR), Fluorocarbon Rubber (FKM), Silicone Rubber (VMQ), etc., to suit different operating environments and media.

Tolerances: The AS-568 standard specifies tolerance ranges for O-ring dimensions to ensure that O-rings are manufactured to meet specific sealing requirements.

Application Guidelines: The AS-568 standard may also include recommendations on the installation and use of O-Rings and how to select the proper O-Ring to meet the needs of a particular application.

Quality Control: Manufacturers of AS-568 compliant O-Rings typically follow strict quality control procedures to ensure that each O-Ring meets the dimensional and performance requirements specified in the standard

AS568	Nominal Size in Inches			Actual Size in Inches			Metric Size in Millimeters			Add to Cart
Dash No.	ID (inch)	OD (inch)	CS (inch)	ID (inch)	OD (inch)	CS (inch)	ID (mm)	OD (mm)	CS (mm)

001	1/32	3/32	1/32	0.029	0.109	0.040	0.74	2.78	1.02	Get a Quote
002	3/64	9/64	3/64	0.042	0.142	0.050	1.07	3.61	1.27	Get a Quote
003	1/16	3/16	1/16	0.056	0.176	0.060	1.42	4.46	1.52	Get a Quote
004	5/64	13/64	1/16	0.070	0.210	0.070	1.78	5.34	1.78	Get a Quote
005	3/32	7/32	1/16	0.101	0.241	0.070	2.57	6.13	1.78	Get a Quote
006	1/8	1/4	1/16	0.114	0.254	0.070	2.90	6.46	1.78	Get a Quote
007	5/32	9/32	1/16	0.145	0.285	0.070	3.68	7.24	1.78	Get a Quote
008	3/16	5/16	1/16	0.176	0.316	0.070	4.47	8.03	1.78	Get a Quote
009	7/32	11/32	1/16	0.208	0.348	0.070	5.28	8.84	1.78	Get a Quote
010	1/4	3/8	1/16	0.239	0.379	0.070	6.07	9.63	1.78	Get a Quote
011	5/16	7/16	1/16	0.301	0.441	0.070	7.65	11.21	1.78	Get a Quote
012	3/8	1/2	1/16	0.364	0.504	0.070	9.25	12.81	1.78	Get a Quote
013	7/16	9/16	1/16	0.426	0.566	0.070	10.82	14.38	1.78	Get a Quote
014	1/2	5/8	1/16	0.489	0.629	0.070	12.42	15.98	1.78	Get a Quote
015	9/16	11/16	1/16	0.551	0.691	0.070	14.00	17.56	1.78	Get a Quote
016	5/8	3/4	1/16	0.614	0.754	0.070	15.60	19.16	1.78	Get a Quote
017	11/16	13/16	1/16	0.676	0.816	0.070	17.17	20.73	1.78	Get a Quote
018	3/4	7/8	1/16	0.739	0.879	0.070	18.77	22.33	1.78	Get a Quote
019	13/16	15/16	1/16	0.801	0.941	0.070	20.35	23.91	1.78	Get a Quote
020	7/8	1	1/16	0.864	1.004	0.070	21.95	25.51	1.78	Get a Quote
021	15/16	1-1/16	1/16	0.926	1.066	0.070	23.52	27.08	1.78	Get a Quote
022	1	1-1/8	1/16	0.989	1.129	0.070	25.12	28.68	1.78	Get a Quote
023	1-1/16	1-3/16	1/16	1.051	1.191	0.070	26.70	30.26	1.78	Get a Quote
024	1-1/8	1-1/4	1/16	1.114	1.254	0.070	28.30	31.86	1.78	Get a Quote
025	1-3/16	1-5/16	1/16	1.176	1.316	0.070	29.87	33.43	1.78	Get a Quote
026	1-1/4	1-3/8	1/16	1.239	1.379	0.070	31.47	35.03	1.78	Get a Quote
027	1-5/16	1-7/16	1/16	1.301	1.441	0.070	33.05	36.61	1.78	Get a Quote
028	1-3/8	1-1/2	1/16	1.364	1.504	0.070	34.65	38.21	1.78	Get a Quote
029	1-1/2	1-5/8	1/16	1.489	1.629	0.070	37.82	41.38	1.78	Get a Quote
030	1-5/8	1-3/4	1/16	1.614	1.754	0.070	41.00	44.56	1.78	Get a Quote
031	1-3/4	1-7/8	1/16	1.739	1.879	0.070	44.17	47.73	1.78	Get a Quote
032	1-7/8	2	1/16	1.864	2.004	0.070	47.35	50.91	1.78	Get a Quote
033	2	2-1/8	1/16	1.989	2.129	0.070	50.52	54.08	1.78	Get a Quote
034	2-1/8	2-1/4	1/16	2.114	2.254	0.070	53.70	57.26	1.78	Get a Quote
035	2-1/4	2-3/8	1/16	2.239	2.379	0.070	56.87	60.43	1.78	Get a Quote
036	2-3/8	2-1/2	1/16	2.364	2.504	0.070	60.05	63.61	1.78	Get a Quote
037	2-1/2	2-5/8	1/16	2.489	2.629	0.070	63.22	66.78	1.78	Get a Quote
038	2-5/8	2-3/4	1/16	2.614	2.754	0.070	66.40	69.96	1.78	Get a Quote
039	2-3/4	2-7/8	1/16	2.739	2.879	0.070	69.57	73.13	1.78	Get a Quote
040	2-7/8	3	1/16	2.864	3.004	0.070	72.75	76.31	1.78	Get a Quote
041	3	3-1/8	1/16	2.989	3.129	0.070	75.92	79.48	1.78	Get a Quote
042	3-1/4	3-3/8	1/16	3.239	3.379	0.070	82.27	85.83	1.78	Get a Quote
043	3-1/2	3-5/8	1/16	3.489	3.629	0.070	88.62	92.18	1.78	Get a Quote
044	3-3/4	3-7/8	1/16	3.739	3.879	0.070	94.97	98.53	1.78	Get a Quote
045	4	4-1/8	1/16	3.989	4.129	0.070	101.32	104.88	1.78	Get a Quote
046	4-1/4	4-3/8	1/16	4.239	4.379	0.070	107.67	111.23	1.78	Get a Quote
047	4-1/2	4-5/8	1/16	4.489	4.629	0.070	114.02	117.58	1.78	Get a Quote
048	4-3/4	4-7/8	1/16	4.739	4.879	0.070	120.37	123.93	1.78	Get a Quote
049	5	5-1/8	1/16	4.989	5.129	0.070	126.72	130.28	1.78	Get a Quote
050	5-1/4	5-3/8	1/16	5.239	5.379	0.070	133.07	136.63	1.78	Get a Quote
102	1/16	1/4	3/32	0.049	0.255	0.103	1.24	6.48	2.62	Get a Quote
103	3/32	9/32	3/32	0.081	0.287	0.103	2.06	7.30	2.62	Get a Quote
104	1/8	5/16	3/32	0.112	0.318	0.103	2.84	8.08	2.62	Get a Quote
105	5/32	11/32	3/32	0.143	0.349	0.103	3.63	8.87	2.62	Get a Quote
106	3/16	3/8	3/32	0.174	0.380	0.103	4.42	9.66	2.62	Get a Quote
107	7/32	13/32	3/32	0.206	0.412	0.103	5.23	10.47	2.62	Get a Quote
108	1/4	7/16	3/32	0.237	0.443	0.103	6.02	11.26	2.62	Get a Quote
109	5/16	1/2	3/32	0.299	0.505	0.103	7.59	12.83	2.62	Get a Quote
110	3/8	9/16	3/32	0.362	0.568	0.103	9.19	14.43	2.62	Get a Quote
111	7/16	5/8	3/32	0.424	0.630	0.103	10.77	16.01	2.62	Get a Quote
112	1/2	11/16	3/32	0.487	0.693	0.103	12.37	17.61	2.62	Get a Quote
113	9/16	3/4	3/32	0.549	0.755	0.103	13.94	19.18	2.62	Get a Quote
114	5/8	13/16	3/32	0.612	0.818	0.103	15.54	20.78	2.62	Get a Quote
115	11/16	7/8	3/32	0.674	0.880	0.103	17.12	22.36	2.62	Get a Quote
116	3/4	15/16	3/32	0.737	0.943	0.103	18.72	23.96	2.62	Get a Quote
117	13/16	1	3/32	0.799	1.005	0.103	20.29	25.54	2.62	Get a Quote
118	7/8	1-1/16	3/32	0.862	1.068	0.103	21.89	27.13	2.62	Get a Quote
119	15/16	1-1/8	3/32	0.924	1.130	0.103	23.47	28.71	2.62	Get a Quote
120	1	1-3/16	3/32	0.987	1.193	0.103	25.07	30.31	2.62	Get a Quote
121	1-1/16	1-1/4	3/32	1.049	1.255	0.103	26.64	31.88	2.62	Get a Quote
122	1-1/8	1-5/16	3/32	1.112	1.318	0.103	28.24	33.48	2.62	Get a Quote
123	1-3/16	1-3/8	3/32	1.174	1.380	0.103	29.82	35.06	2.62	Get a Quote
124	1-1/4	1-7/16	3/32	1.237	1.443	0.103	31.42	36.66	2.62	Get a Quote
125	1-5/16	1-1/2	3/32	1.299	1.505	0.103	32.99	38.23	2.62	Get a Quote
126	1-3/8	1-9/16	3/32	1.362	1.568	0.103	34.59	39.83	2.62	Get a Quote
127	1-7/16	1-5/8	3/32	1.424	1.630	0.103	36.17	41.41	2.62	Get a Quote
128	1-1/2	1-11/16	3/32	1.487	1.693	0.103	37.77	43.01	2.62	Get a Quote
129	1-9/16	1-3/4	3/32	1.549	1.755	0.103	39.34	44.58	2.62	Get a Quote
130	1-5/8	1-13/16	3/32	1.612	1.818	0.103	40.94	46.18	2.62	Get a Quote
131	1-11/16	1-7/8	3/32	1.674	1.880	0.103	42.52	47.76	2.62	Get a Quote
132	1-3/4	1-15/16	3/32	1.737	1.943	0.103	44.12	49.36	2.62	Get a Quote
133	1-13/16	2	3/32	1.799	2.005	0.103	45.69	50.93	2.62	Get a Quote
134	1-7/8	2-1/16	3/32	1.862	2.068	0.103	47.29	52.54	2.62	Get a Quote
135	1-15/16	2-1/8	3/32	1.925	2.131	0.103	48.90	54.14	2.62	Get a Quote
136	2	2-3/16	3/32	1.987	2.193	0.103	50.47	55.71	2.62	Get a Quote
137	2-1/16	2-1/4	3/32	2.050	2.256	0.103	52.07	57.31	2.62	Get a Quote
138	2-1/8	2-5/16	3/32	2.112	2.318	0.103	53.64	58.88	2.62	Get a Quote
139	2-3/16	2-3/8	3/32	2.175	2.381	0.103	55.25	60.49	2.62	Get a Quote
140	2-1/4	2-7/16	3/32	2.237	2.443	0.103	56.82	62.06	2.62	Get a Quote
141	2-5/16	2-1/2	3/32	2.300	2.506	0.103	58.42	63.66	2.62	Get a Quote
142	2-3/8	2-9/16	3/32	2.362	2.568	0.103	59.99	65.23	2.62	Get a Quote
143	2-7/16	2-5/8	3/32	2.425	2.631	0.103	61.60	66.84	2.62	Get a Quote
144	2-1/2	2-11/16	3/32	2.487	2.693	0.103	63.17	68.41	2.62	Get a Quote
145	2-9/16	2-3/4	3/32	2.550	2.756	0.103	64.77	70.01	2.62	Get a Quote
146	2-5/8	2-13/16	3/32	2.612	2.818	0.103	66.34	71.58	2.62	Get a Quote
147	2-11/16	2-7/8	3/32	2.675	2.881	0.103	67.95	73.19	2.62	Get a Quote
148	2-3/4	2-15/16	3/32	2.737	2.943	0.103	69.52	74.76	2.62	Get a Quote
149	2-13/16	3	3/32	2.800	3.006	0.103	71.12	76.36	2.62	Get a Quote
150	2-7/8	3-1/16	3/32	2.862	3.068	0.103	72.69	77.93	2.62	Get a Quote
151	3	3-3/16	3/32	2.987	3.193	0.103	75.87	81.11	2.62	Get a Quote
152	3-1/4	3-7/16	3/32	3.237	3.443	0.103	82.22	87.46	2.62	Get a Quote
153	3-1/2	3-11/16	3/32	3.487	3.693	0.103	88.57	93.81	2.62	Get a Quote
154	3-3/4	3-15/16	3/32	3.737	3.943	0.103	94.92	100.16	2.62	Get a Quote
155	4	4-3/16	3/32	3.987	4.193	0.103	101.27	106.51	2.62	Get a Quote
156	4-1/4	4-7/16	3/32	4.237	4.443	0.103	107.62	112.86	2.62	Get a Quote
157	4-1/2	4-11/16	3/32	4.487	4.693	0.103	113.97	119.21	2.62	Get a Quote
158	4-3/4	4-15/16	3/32	4.737	4.943	0.103	120.32	125.56	2.62	Get a Quote
159	5	5-3/16	3/32	4.987	5.193	0.103	126.67	131.91	2.62	Get a Quote
160	5-1/4	5-7/16	3/32	5.237	5.443	0.103	133.02	138.26	2.62	Get a Quote
161	5-1/2	5-11/16	3/32	5.487	5.693	0.103	139.37	144.61	2.62	Get a Quote
162	5-3/4	5-15/16	3/32	5.737	5.943	0.103	145.72	150.96	2.62	Get a Quote
163	6	6-3/16	3/32	5.987	6.193	0.103	152.07	157.31	2.62	Get a Quote
164	6-1/4	6-7/16	3/32	6.237	6.443	0.103	158.42	163.66	2.62	Get a Quote
165	6-1/2	6-11/16	3/32	6.487	6.693	0.103	164.77	170.01	2.62	Get a Quote
166	6-3/4	6-15/16	3/32	6.737	6.943	0.103	171.12	176.36	2.62	Get a Quote
167	7	7-3/16	3/32	6.987	7.193	0.103	177.47	182.71	2.62	Get a Quote
168	7-1/4	7-7/16	3/32	7.237	7.443	0.103	183.82	189.06	2.62	Get a Quote
169	7-1/2	7-11/16	3/32	7.487	7.693	0.103	190.17	195.41	2.62	Get a Quote
170	7-3/4	7-15/16	3/32	7.737	7.943	0.103	196.52	201.76	2.62	Get a Quote
171	8	8-3/16	3/32	7.987	8.193	0.103	202.87	208.11	2.62	Get a Quote
172	8-1/4	8-7/16	3/32	8.237	8.443	0.103	209.22	214.46	2.62	Get a Quote
173	8-1/2	8-11/16	3/32	8.487	8.693	0.103	215.57	220.81	2.62	Get a Quote
174	8-3/4	8-15/16	3/32	8.737	8.943	0.103	221.92	227.16	2.62	Get a Quote
175	9	9-3/16	3/32	8.987	9.193	0.103	228.27	233.51	2.62	Get a Quote
176	9-1/4	9-7/16	3/32	9.237	9.443	0.103	234.62	239.86	2.62	Get a Quote
177	9-1/2	9-11/16	3/32	9.487	9.693	0.103	240.97	246.21	2.62	Get a Quote
178	9-3/4	9-15/16	3/32	9.737	9.943	0.103	247.32	252.56	2.62	Get a Quote
201	3/16	7/16	1/8	0.171	0.449	0.139	4.34	11.40	3.53	Get a Quote
202	1/4	1/2	1/8	0.234	0.512	0.139	5.94	13.00	3.53	Get a Quote
203	5/16	9/16	1/8	0.296	0.574	0.139	7.52	14.58	3.53	Get a Quote
204	3/8	5/8	1/8	0.359	0.637	0.139	9.12	16.18	3.53	Get a Quote
205	7/16	11/16	1/8	0.421	0.699	0.139	10.69	17.75	3.53	Get a Quote
206	1/2	3/4	1/8	0.484	0.762	0.139	12.29	19.35	3.53	Get a Quote
207	9/16	13/16	1/8	0.546	0.824	0.139	13.87	20.93	3.53	Get a Quote
208	5/8	7/8	1/8	0.609	0.887	0.139	15.47	22.53	3.53	Get a Quote
209	11/16	15/16	1/8	0.671	0.949	0.139	17.04	24.10	3.53	Get a Quote
210	3/4	1	1/8	0.734	1.012	0.139	18.64	25.70	3.53	Get a Quote
211	13/16	1-1/16	1/8	0.796	1.074	0.139	20.22	27.28	3.53	Get a Quote
212	7/8	1-1/8	1/8	0.859	1.137	0.139	21.82	28.88	3.53	Get a Quote
213	15/16	1-3/16	1/8	0.921	1.199	0.139	23.39	30.45	3.53	Get a Quote
214	1	1-1/4	1/8	0.984	1.262	0.139	24.99	32.06	3.53	Get a Quote
215	1-1/16	1-5/16	1/8	1.046	1.324	0.139	26.57	33.63	3.53	Get a Quote
216	1-1/8	1-3/8	1/8	1.109	1.387	0.139	28.17	35.23	3.53	Get a Quote
217	1-3/16	1-7/16	1/8	1.171	1.449	0.139	29.74	36.80	3.53	Get a Quote
218	1-1/4	1-1/2	1/8	1.234	1.512	0.139	31.34	38.40	3.53	Get a Quote
219	1-5/16	1-9/16	1/8	1.296	1.574	0.139	32.92	39.98	3.53	Get a Quote
220	1-3/8	1-5/8	1/8	1.359	1.637	0.139	34.52	41.58	3.53	Get a Quote
221	1-7/16	1-11/16	1/8	1.421	1.699	0.139	36.09	43.15	3.53	Get a Quote
222	1-1/2	1-3/4	1/8	1.484	1.762	0.139	37.69	44.75	3.53	Get a Quote
223	1-5/8	1-7/8	1/8	1.609	1.887	0.139	40.87	47.93	3.53	Get a Quote
224	1-3/4	2	1/8	1.734	2.012	0.139	44.04	51.10	3.53	Get a Quote
225	1-7/8	2-1/8	1/8	1.859	2.137	0.139	47.22	54.28	3.53	Get a Quote
226	2	2-1/4	1/8	1.984	2.262	0.139	50.39	57.45	3.53	Get a Quote
227	2-1/8	2-3/8	1/8	2.109	2.387	0.139	53.57	60.63	3.53	Get a Quote
228	2-1/4	2-1/2	1/8	2.234	2.512	0.139	56.74	63.80	3.53	Get a Quote
229	2-3/8	2-5/8	1/8	2.359	2.637	0.139	59.92	66.98	3.53	Get a Quote
230	2-1/2	2-3/4	1/8	2.484	2.762	0.139	63.09	70.15	3.53	Get a Quote
231	2-5/8	2-7/8	1/8	2.609	2.887	0.139	66.27	73.33	3.53	Get a Quote
232	2-3/4	3	1/8	2.734	3.012	0.139	69.44	76.50	3.53	Get a Quote
233	2-7/8	3-1/8	1/8	2.859	3.137	0.139	72.62	79.68	3.53	Get a Quote
234	3	3-1/4	1/8	2.984	3.262	0.139	75.79	82.85	3.53	Get a Quote
235	3-1/8	3-3/8	1/8	3.109	3.387	0.139	78.97	86.03	3.53	Get a Quote
236	3-1/4	3-1/2	1/8	3.234	3.512	0.139	82.14	89.20	3.53	Get a Quote
237	3-3/8	3-5/8	1/8	3.359	3.637	0.139	85.32	92.38	3.53	Get a Quote
238	3-1/2	3-3/4	1/8	3.484	3.762	0.139	88.49	95.55	3.53	Get a Quote
239	3-5/8	3-7/8	1/8	3.609	3.887	0.139	91.67	98.73	3.53	Get a Quote
240	3-3/4	4	1/8	3.734	4.012	0.139	94.84	101.90	3.53	Get a Quote
241	3-7/8	4-1/8	1/8	3.859	4.137	0.139	98.02	105.08	3.53	Get a Quote
242	4	4-1/4	1/8	3.984	4.262	0.139	101.19	108.25	3.53	Get a Quote
243	4-1/8	4-3/8	1/8	4.109	4.387	0.139	104.37	111.43	3.53	Get a Quote
244	4-1/4	4-1/2	1/8	4.234	4.512	0.139	107.54	114.60	3.53	Get a Quote
245	4-3/8	4-5/8	1/8	4.359	4.637	0.139	110.72	117.78	3.53	Get a Quote
246	4-1/2	4-3/4	1/8	4.484	4.762	0.139	113.89	120.95	3.53	Get a Quote
247	4-5/8	4-7/8	1/8	4.609	4.887	0.139	117.07	124.13	3.53	Get a Quote
248	4-3/4	5	1/8	4.734	5.012	0.139	120.24	127.30	3.53	Get a Quote
249	4-7/8	5-1/8	1/8	4.859	5.137	0.139	123.42	130.48	3.53	Get a Quote
250	5	5-1/4	1/8	4.984	5.262	0.139	126.59	133.65	3.53	Get a Quote
251	5-1/8	5-3/8	1/8	5.109	5.387	0.139	129.77	136.83	3.53	Get a Quote
252	5-1/4	5-1/2	1/8	5.234	5.512	0.139	132.94	140.00	3.53	Get a Quote
253	5-3/8	5-5/8	1/8	5.359	5.637	0.139	136.12	143.18	3.53	Get a Quote
254	5-1/2	5-3/4	1/8	5.484	5.762	0.139	139.29	146.35	3.53	Get a Quote
255	5-5/8	5-7/8	1/8	5.609	5.887	0.139	142.47	149.53	3.53	Get a Quote
256	5-3/4	6	1/8	5.734	6.012	0.139	145.64	152.71	3.53	Get a Quote
257	5-7/8	6-1/8	1/8	5.859	6.137	0.139	148.82	155.88	3.53	Get a Quote
258	6	6-1/4	1/8	5.984	6.262	0.139	151.99	159.05	3.53	Get a Quote
259	6-1/4	6-1/2	1/8	6.234	6.512	0.139	158.34	165.40	3.53	Get a Quote
260	6-1/2	6-3/4	1/8	6.484	6.762	0.139	164.69	171.75	3.53	Get a Quote
261	6-3/4	7	1/8	6.734	7.012	0.139	171.04	178.10	3.53	Get a Quote
262	7	7-1/4	1/8	6.984	7.262	0.139	177.39	184.45	3.53	Get a Quote
263	7-1/4	7-1/2	1/8	7.234	7.512	0.139	183.74	190.80	3.53	Get a Quote
264	7-1/2	7-3/4	1/8	7.484	7.762	0.139	190.09	197.15	3.53	Get a Quote
265	7-3/4	8	1/8	7.734	8.012	0.139	196.44	203.50	3.53	Get a Quote
266	8	8-1/4	1/8	7.984	8.262	0.139	202.79	209.85	3.53	Get a Quote
267	8-1/4	8-1/2	1/8	8.234	8.512	0.139	209.14	216.20	3.53	Get a Quote
268	8-1/2	8-3/4	1/8	8.484	8.762	0.139	215.49	222.55	3.53	Get a Quote
269	8-3/4	9	1/8	8.734	9.012	0.139	221.84	228.90	3.53	Get a Quote
270	9	9-1/4	1/8	8.984	9.262	0.139	228.19	235.25	3.53	Get a Quote
271	9-1/4	9-1/2	1/8	9.234	9.512	0.139	234.54	241.60	3.53	Get a Quote
272	9-1/2	9-3/4	1/8	9.484	9.762	0.139	240.89	247.95	3.53	Get a Quote
273	9-3/4	10	1/8	9.734	10.012	0.139	247.24	254.30	3.53	Get a Quote
274	10	10-1/4	1/8	9.984	10.262	0.139	253.59	260.65	3.53	Get a Quote
275	10-1/2	10-3/4	1/8	10.484	10.762	0.139	266.29	273.35	3.53	Get a Quote
276	11	11-1/4	1/8	10.984	11.262	0.139	278.99	286.05	3.53	Get a Quote
277	11-1/2	11-3/4	1/8	11.484	11.762	0.139	291.69	298.75	3.53	Get a Quote
278	12	12-1/4	1/8	11.984	12.262	0.139	304.39	311.45	3.53	Get a Quote
279	13	13-1/4	1/8	12.984	13.262	0.139	329.79	336.85	3.53	Get a Quote
280	14	14-1/4	1/8	13.984	14.262	0.139	355.19	362.25	3.53	Get a Quote
281	15	15-1/4	1/8	14.984	15.262	0.139	380.59	387.65	3.53	Get a Quote
282	16	16-1/4	1/8	15.955	16.233	0.139	405.26	412.32	3.53	Get a Quote
283	17	17-1/4	1/8	16.955	17.233	0.139	430.66	437.72	3.53	Get a Quote
284	18	18-1/4	1/8	17.955	18.233	0.139	456.06	463.12	3.53	Get a Quote
309	7/16	13/16	3/16	0.412	0.832	0.210	10.46	21.12	5.33	Get a Quote
310	1/2	7/8	3/16	0.475	0.895	0.210	12.07	22.73	5.33	Get a Quote
311	9/16	15/16	3/16	0.537	0.957	0.210	13.64	24.30	5.33	Get a Quote
312	5/8	1	3/16	0.600	1.020	0.210	15.24	25.90	5.33	Get a Quote
313	11/16	1-1/16	3/16	0.662	1.082	0.210	16.81	27.47	5.33	Get a Quote
314	3/4	1-1/8	3/16	0.725	1.145	0.210	18.42	29.08	5.33	Get a Quote
315	13/16	1-3/16	3/16	0.787	1.207	0.210	19.99	30.65	5.33	Get a Quote
316	7/8	1-1/4	3/16	0.850	1.270	0.210	21.59	32.25	5.33	Get a Quote
317	15/16	1-5/16	3/16	0.912	1.332	0.210	23.16	33.82	5.33	Get a Quote
318	1	1-3/8	3/16	0.975	1.395	0.210	24.77	35.43	5.33	Get a Quote
319	1-1/16	1-7/16	3/16	1.037	1.457	0.210	26.34	37.00	5.33	Get a Quote
320	1-1/8	1-1/2	3/16	1.100	1.520	0.210	27.94	38.60	5.33	Get a Quote
321	1-3/16	1-9/16	3/16	1.162	1.582	0.210	29.51	40.17	5.33	Get a Quote
322	1-1/4	1-5/8	3/16	1.225	1.645	0.210	31.12	41.78	5.33	Get a Quote
323	1-5/16	1-11/16	3/16	1.287	1.707	0.210	32.69	43.35	5.33	Get a Quote
324	1-3/8	1-3/4	3/16	1.350	1.770	0.210	34.29	44.95	5.33	Get a Quote
325	1-1/2	1-7/8	3/16	1.475	1.895	0.210	37.47	48.13	5.33	Get a Quote
326	1-5/8	2	3/16	1.600	2.020	0.210	40.64	51.30	5.33	Get a Quote
327	1-3/4	2-1/8	3/16	1.725	2.145	0.210	43.82	54.48	5.33	Get a Quote
328	1-7/8	2-1/4	3/16	1.850	2.270	0.210	46.99	57.65	5.33	Get a Quote
329	2	2-3/8	3/16	1.975	2.395	0.210	50.17	60.83	5.33	Get a Quote
330	2-1/8	2-1/2	3/16	2.100	2.520	0.210	53.34	64.00	5.33	Get a Quote
331	2-1/4	2-5/8	3/16	2.225	2.645	0.210	56.52	67.18	5.33	Get a Quote
332	2-3/8	2-3/4	3/16	2.350	2.770	0.210	59.69	70.35	5.33	Get a Quote
333	2-1/2	2-7/8	3/16	2.475	2.895	0.210	62.87	73.53	5.33	Get a Quote
334	2-5/8	3	3/16	2.600	3.020	0.210	66.04	76.70	5.33	Get a Quote
335	2-3/4	3-1/8	3/16	2.725	3.145	0.210	69.22	79.88	5.33	Get a Quote
336	2-7/8	3-1/4	3/16	2.850	3.270	0.210	72.39	83.05	5.33	Get a Quote
337	3	3-3/8	3/16	2.975	3.395	0.210	75.57	86.23	5.33	Get a Quote
338	3-1/8	3-1/2	3/16	3.100	3.520	0.210	78.74	89.40	5.33	Get a Quote
339	3-1/4	3-5/8	3/16	3.225	3.645	0.210	81.92	102.58	5.33	Get a Quote
340	3-3/8	3-3/4	3/16	3.350	3.770	0.210	85.09	95.75	5.33	Get a Quote
341	3-1/2	3-7/8	3/16	3.475	3.895	0.210	88.27	98.93	5.33	Get a Quote
342	3-5/8	4	3/16	3.600	4.020	0.210	91.44	102.10	5.33	Get a Quote
343	3-3/4	4-1/8	3/16	3.725	4.145	0.210	94.62	105.28	5.33	Get a Quote
344	3-7/8	4-1/4	3/16	3.850	4.270	0.210	97.79	108.45	5.33	Get a Quote
345	4	4-3/8	3/16	3.975	4.395	0.210	100.97	111.63	5.33	Get a Quote
346	4-1/8	4-1/2	3/16	4.100	4.520	0.210	104.14	114.80	5.33	Get a Quote
347	4-1/4	4-5/8	3/16	4.225	4.645	0.210	107.32	117.98	5.33	Get a Quote
348	4-3/8	4-3/4	3/16	4.350	4.770	0.210	110.49	121.15	5.33	Get a Quote
349	4-1/2	4-7/8	3/16	4.475	4.895	0.210	113.67	124.33	5.33	Get a Quote
350	4-5/8	5	3/16	4.600	5.020	0.210	116.84	127.50	5.33	Get a Quote
351	4-3/4	5-1/8	3/16	4.725	5.145	0.210	120.02	130.68	5.33	Get a Quote
352	4-7/8	5-1/4	3/16	4.850	5.270	0.210	123.19	133.85	5.33	Get a Quote
353	5	5-3/8	3/16	4.975	5.395	0.210	126.37	137.03	5.33	Get a Quote
354	5-1/8	5-1/2	3/16	5.100	5.520	0.210	129.54	140.20	5.33	Get a Quote
355	5-1/4	5-5/8	3/16	5.225	5.645	0.210	132.72	143.38	5.33	Get a Quote
356	5-3/8	5-3/4	3/16	5.350	5.770	0.210	135.89	146.55	5.33	Get a Quote
357	5-1/2	5-7/8	3/16	5.475	5.895	0.210	139.07	149.73	5.33	Get a Quote
358	5-5/8	6	3/16	5.600	6.020	0.210	142.24	152.90	5.33	Get a Quote
359	5-3/4	6-1/8	3/16	5.725	6.145	0.210	145.42	156.08	5.33	Get a Quote
360	5-7/8	6-1/4	3/16	5.850	6.270	0.210	148.59	159.25	5.33	Get a Quote
361	6	6-3/8	3/16	5.975	6.395	0.210	151.77	162.43	5.33	Get a Quote
362	6-1/4	6-5/8	3/16	6.225	6.645	0.210	158.12	168.78	5.33	Get a Quote
363	6-1/2	6-7/8	3/16	6.475	6.895	0.210	164.47	175.13	5.33	Get a Quote
364	6-3/4	7-1/8	3/16	6.725	7.145	0.210	170.82	181.48	5.33	Get a Quote
365	7	7-3/8	3/16	6.975	7.395	0.210	177.17	187.83	5.33	Get a Quote
366	7-1/4	7-5/8	3/16	7.225	7.645	0.210	183.52	194.18	5.33	Get a Quote
367	7-1/2	7-7/8	3/16	7.475	7.895	0.210	189.87	200.53	5.33	Get a Quote
368	7-3/4	8-1/8	3/16	7.725	8.145	0.210	196.22	206.88	5.33	Get a Quote
369	8	8-3/8	3/16	7.975	8.395	0.210	202.57	213.23	5.33	Get a Quote
370	8-1/4	8-5/8	3/16	8.225	8.645	0.210	208.92	219.58	5.33	Get a Quote
371	8-1/2	8-7/8	3/16	8.475	8.895	0.210	215.27	225.93	5.33	Get a Quote
372	8-3/4	9-1/8	3/16	8.725	9.145	0.210	221.62	232.28	5.33	Get a Quote
373	9	9-3/8	3/16	8.975	9.395	0.210	227.97	238.63	5.33	Get a Quote
374	9-1/4	9-5/8	3/16	9.225	9.645	0.210	234.32	244.98	5.33	Get a Quote
375	9-1/2	9-7/8	3/16	9.475	9.895	0.210	240.67	251.33	5.33	Get a Quote
376	9-3/4	10-1/8	3/16	9.725	10.145	0.210	247.02	257.68	5.33	Get a Quote
377	10	10-3/8	3/16	9.975	10.395	0.210	253.37	264.03	5.33	Get a Quote
378	10-1/2	10-7/8	3/16	10.475	10.895	0.210	266.07	276.73	5.33	Get a Quote
379	11	11-3/8	3/16	10.975	11.395	0.210	278.77	289.43	5.33	Get a Quote
380	11-1/2	11-7/8	3/16	11.475	11.895	0.210	291.47	302.13	5.33	Get a Quote
381	12	12-3/8	3/16	11.975	12.395	0.210	304.17	314.83	5.33	Get a Quote
382	13	13-3/8	3/16	12.975	13.395	0.210	329.57	340.23	5.33	Get a Quote
383	14	14-3/8	3/16	13.975	14.395	0.210	354.97	365.63	5.33	Get a Quote
384	15	15-3/8	3/16	14.975	15.395	0.210	380.37	391.03	5.33	Get a Quote
385	16	16-3/8	3/16	15.955	16.375	0.210	405.26	415.92	5.33	Get a Quote
386	17	17-3/8	3/16	16.955	17.375	0.210	430.66	441.32	5.33	Get a Quote
387	18	18-3/8	3/16	17.955	18.375	0.210	456.06	466.72	5.33	Get a Quote
388	19	19-3/8	3/16	18.955	19.375	0.210	481.46	492.07	5.33	Get a Quote
389	20	20-3/8	3/16	19.955	20.375	0.210	506.86	517.47	5.33	Get a Quote
390	21	21-3/8	3/16	20.955	21.375	0.210	532.26	542.87	5.33	Get a Quote
391	22	22-3/8	3/16	21.955	22.375	0.210	557.66	568.27	5.33	Get a Quote
392	23	23-3/8	3/16	22.940	23.360	0.210	582.68	593.34	5.33	Get a Quote
393	24	24-3/8	3/16	23.940	24.360	0.210	608.08	618.74	5.33	Get a Quote
394	25	25-3/8	3/16	24.940	25.360	0.210	633.48	644.14	5.33	Get a Quote
395	26	26-3/8	3/16	25.940	26.360	0.210	658.88	669.54	5.33	Get a Quote
400	1-3/8	1-7/8	1/4	1.350	1.900	0.275	34.29	48.26	6.99	Get a Quote
401	1-1/2	2	1/4	1.475	2.025	0.275	37.47	51.44	6.99	Get a Quote
402	1-5/8	2-1/8	1/4	1.600	2.150	0.275	40.64	54.61	6.99	Get a Quote
403	1-3/4	2-1/4	1/4	1.725	2.275	0.275	43.82	57.79	6.99	Get a Quote
404	1-7/8	2-3/8	1/4	1.850	2.400	0.275	46.99	60.96	6.99	Get a Quote
405	2	2-1/2	1/4	1.975	2.525	0.275	50.17	64.14	6.99	Get a Quote
406	2-1/8	2-5/8	1/4	2.100	2.650	0.275	53.34	67.31	6.99	Get a Quote
407	2-1/4	2-3/4	1/4	2.225	2.775	0.275	56.52	70.49	6.99	Get a Quote
408	2-3/8	2-7/8	1/4	2.350	2.900	0.275	59.69	73.66	6.99	Get a Quote
409	2-1/2	3	1/4	2.475	3.025	0.275	62.87	76.84	6.99	Get a Quote
410	2-5/8	3-1/8	1/4	2.600	3.150	0.275	66.04	80.01	6.99	Get a Quote
411	2-3/4	3-1/4	1/4	2.725	3.275	0.275	69.22	83.19	6.99	Get a Quote
412	2-7/8	3-3/8	1/4	2.850	3.400	0.275	72.39	86.36	6.99	Get a Quote
413	3	3-1/2	1/4	2.975	3.525	0.275	75.57	89.54	6.99	Get a Quote
414	3-1/8	3-5/8	1/4	3.100	3.650	0.275	78.74	92.71	6.99	Get a Quote
415	3-1/4	3-3/4	1/4	3.225	3.775	0.275	81.92	95.89	6.99	Get a Quote
416	3-3/8	3-7/8	1/4	3.350	3.900	0.275	85.09	99.06	6.99	Get a Quote
417	3-1/2	4	1/4	3.475	4.025	0.275	88.27	102.24	6.99	Get a Quote
418	3-5/8	4-1/8	1/4	3.600	4.150	0.275	91.44	105.41	6.99	Get a Quote
419	3-3/4	4-1/4	1/4	3.725	4.275	0.275	94.62	108.59	6.99	Get a Quote
420	3-7/8	4-3/8	1/4	3.850	4.400	0.275	97.79	111.76	6.99	Get a Quote
421	4	4-1/2	1/4	3.975	4.525	0.275	100.97	114.94	6.99	Get a Quote
422	4-1/8	4-5/8	1/4	4.100	4.650	0.275	104.14	118.11	6.99	Get a Quote
423	4-1/4	4-3/4	1/4	4.225	4.775	0.275	107.32	121.29	6.99	Get a Quote
424	4-3/8	4-7/8	1/4	4.350	4.900	0.275	110.49	124.46	6.99	Get a Quote
425	4-1/2	5	1/4	4.475	5.025	0.275	113.67	127.65	6.99	Get a Quote
426	4-5/8	5-1/8	1/4	4.600	5.150	0.275	116.84	130.82	6.99	Get a Quote
427	4-3/4	5-1/4	1/4	4.725	5.275	0.275	120.02	134.00	6.99	Get a Quote
428	4-7/8	5-3/8	1/4	4.850	5.400	0.275	123.19	137.17	6.99	Get a Quote
429	5	5-1/2	1/4	4.975	5.525	0.275	126.37	140.35	6.99	Get a Quote
430	5-1/8	5-5/8	1/4	5.100	5.650	0.275	129.54	143.52	6.99	Get a Quote
431	5-1/4	5-3/4	1/4	5.225	5.775	0.275	132.72	146.70	6.99	Get a Quote
432	5-3/8	5-7/8	1/4	5.350	5.900	0.275	135.89	149.87	6.99	Get a Quote
433	5-1/2	6	1/4	5.475	6.025	0.275	139.07	153.05	6.99	Get a Quote
434	5-5/8	6-1/8	1/4	5.600	6.150	0.275	142.24	156.22	6.99	Get a Quote
435	5-3/4	6-1/4	1/4	5.725	6.275	0.275	145.42	159.40	6.99	Get a Quote
436	5-7/8	6-3/8	1/4	5.850	6.400	0.275	148.59	162.57	6.99	Get a Quote
437	6	6-1/2	1/4	5.975	6.525	0.275	151.77	165.75	6.99	Get a Quote
438	6-1/4	6-3/4	1/4	6.225	6.775	0.275	158.12	172.10	6.99	Get a Quote
439	6-1/2	7	1/4	6.475	7.025	0.275	164.47	178.45	6.99	Get a Quote
440	6-3/4	7-1/4	1/4	6.725	7.275	0.275	170.82	184.80	6.99	Get a Quote
453	12	12-1/2	1/4	11.975	12.525	0.275	304.17	318.15	6.99	Get a Quote
454	12-1/2	13	1/4	12.475	13.025	0.275	316.87	330.85	6.99	Get a Quote
455	13	13-1/2	1/4	12.975	13.525	0.275	329.57	343.55	6.99	Get a Quote
456	13-1/2	14	1/4	13.457	14.007	0.275	342.27	356.25	6.99	Get a Quote
457	14	14-1/2	1/4	13.975	14.525	0.275	354.97	368.95	6.99	Get a Quote
458	14-1/2	15	1/4	14.475	15.025	0.275	367.67	381.65	6.99	Get a Quote
459	15	15-1/2	1/4	14.975	15.525	0.275	380.37	394.35	6.99	Get a Quote
460	15-1/2	16	1/4	15.475	16.025	0.275	393.07	407.05	6.99	Get a Quote
461	16	16-1/2	1/4	15.955	16.505	0.275	405.26	419.24	6.99	Get a Quote
462	16-1/2	17	1/4	16.455	17.005	0.275	417.96	431.94	6.99	Get a Quote
463	17	17-1/2	1/4	16.955	17.505	0.275	430.66	444.64	6.99	Get a Quote
464	17-1/2	18	1/4	17.455	18.005	0.275	443.36	457.34	6.99	Get a Quote
465	18	18-1/2	1/4	17.955	18.505	0.275	456.06	470.04	6.99	Get a Quote
466	18-1/2	19	1/4	18.455	19.005	0.275	468.76	482.74	6.99	Get a Quote
467	19	19-1/2	1/4	18.955	19.505	0.275	481.46	495.44	6.99	Get a Quote
468	19-1/2	20	1/4	19.455	20.005	0.275	494.16	508.14	6.99	Get a Quote
469	20	20-1/2	1/4	19.955	20.505	0.275	506.86	520.84	6.99	Get a Quote
470	21	21-1/2	1/4	20.955	21.505	0.275	532.26	546.24	6.99	Get a Quote
471	22	22-1/2	1/4	21.955	22.505	0.275	557.66	571.64	6.99	Get a Quote
472	23	23-1/2	1/4	22.940	23.490	0.275	582.68	596.66	6.99	Get a Quote
473	24	24-1/2	1/4	23.940	24.490	0.275	608.08	622.06	6.99	Get a Quote
474	25	25-1/2	1/4	24.940	25.490	0.275	633.48	647.46	6.99	Get a Quote
475	26	26-1/2	1/4	25.940	26.490	0.275	658.88	672.86	6.99	Get a Quote
901	3/32	0.094	2.380	0.185	0.297	0.056	4.70	7.54	1.42	Get a Quote
902	1/8	0.125	3.180	0.239	0.367	0.064	6.07	9.33	1.63	Get a Quote
903	3/16	0.188	4.760	0.301	0.429	0.064	7.65	10.91	1.63	Get a Quote
904	1/4	0.250	6.350	0.351	0.495	0.072	8.92	12.58	1.83	Get a Quote
905	5/16	0.313	7.940	0.414	0.558	0.072	10.52	14.18	1.83	Get a Quote
906	3/8	0.375	9.530	0.468	0.624	0.078	11.89	15.85	1.98	Get a Quote
907	7/16	0.438	11.110	0.530	0.694	0.082	13.46	17.62	2.08	Get a Quote
908	1/2	0.500	12.700	0.644	0.818	0.087	16.36	20.78	2.21	Get a Quote
909	9/16	0.563	14.290	0.706	0.900	0.097	17.93	22.85	2.46	Get a Quote
910	5/8	0.625	15.880	0.755	0.949	0.097	19.18	24.10	2.46	Get a Quote
911	11/16	0.688	17.460	0.863	1.095	0.116	21.92	27.82	2.95	Get a Quote
912	3/4	0.750	19.050	0.924	1.156	0.116	23.47	29.37	2.95	Get a Quote
913	13/16	0.813	20.640	0.986	1.218	0.116	25.04	30.94	2.95	Get a Quote
914	7/8	0.875	22.230	1.047	1.279	0.116	26.59	32.49	2.95	Get a Quote
916	1	1.000	25.400	1.171	1.403	0.116	29.74	35.64	2.95	Get a Quote
918	1-1/8	1.125	28.580	1.355	1.587	0.116	34.42	40.32	2.95	Get a Quote
920	1-1/4	1.250	31.750	1.475	1.707	0.116	37.47	43.47	3.00	Get a Quote
924	1-1/2	1.500	38.100	1.720	1.952	0.116	43.69	49.69	3.00	Get a Quote
928	1-3/4	1.750	44.450	2.090	2.322	0.116	53.09	59.09	3.00	Get a Quote
932	2	2.000	50.800	2.337	2.569	0.116	59.36	65.36	3.00	Get a Quote

If you'd like to discuss your specialty application with a product expert, please contact our CBD SEALS Team：sale@bdseals.com

O-Ring Size Measurement：

Inside Diameter (ID) Measurement:

Use calipers or an ID micrometer to measure the inside diameter of the O-ring.

Measurements should be made to ensure that the O-ring is not twisted or deformed.

Usually measure two or three different locations to ensure consistent dimensions.

Record the smallest measurement as this is usually the tightest dimension of the O-Ring during assembly.

Cross-section diameter (CS) measurement:

Use an OD micrometer or micrometer gauge to measure the cross-section diameter of the O-ring.

Take measurements at several different locations on the O-ring, usually at four equal points along the circumference.

Record the largest measurement, as this is usually the loosest dimension of the O-ring during assembly.

Cross-sectional shape check:

Use a projector or microscope to check the cross-sectional shape of the O-ring.

Ensure that the cross-section is round with no ovality or other distortion.

If irregularities are found in the cross-sectional shape, further inspection of the manufacturing process or material quality may be required.

Hardness test:

Use a hardness tester to measure the hardness of the O-ring, which is important for determining material properties and suitability.

Hardness tests are usually performed at several different locations on the O-Ring to ensure consistency.

Tolerance checking:

Check the dimensional tolerances of the O-Ring according to the relevant standards (e.g. AS568).

Ensure that all measurements are within the specified tolerances.

Material and color check:

Check the material type and color of O-rings to ensure they meet requirements.

This is usually done through visual inspection and material identification testing

AS-568 USA Standard O-ring Size Chart

British BS Standard O-ring Size Chart

Universal Standard O-ring Size Chart

Common Metric Standard O-ring Size Chart

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