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Standard O-ring Sizing Chart

AS-568A DASH #	Actual I.D. Inches	Actual C.S. Inches	Actual I.D. Millimeters	Actual C.S. Milimeters	Nominal Reference I.D.	Nominal Reference C.S.	Nominal Reference O.D.
-001	.029 ±.004	.040 ±.003	0.74 ±0.10	1.02 ±0.08	1/32	1/32	3/32
-002	.042 ±.004	.050 ±.003	1.07 ±0.10	1.27 ±0.08	3/64	3/64	9/64
-003	.056 ±.004	.060 ±.003	1.42 ±0.10	1.52 ±0.08	1/16	1/16	3/16
-004	.070 ±.005	.070 ±.003	1.78 ±0.13	1.78 ±0.08	5/64	1/16	13/64
-005	.101 ±.005	.070 ±.003	2.57 ±0.13	1.78 ±0.08	3/32	1/16	7/32
-006	.114 ±.005	.070 ±.003	2.90 ±0.13	1.78 ±0.08	1/8	1/16	1/4
-007	.145 ±.005	.070 ±.003	3.68 ±0.13	1.78 ±0.08	5/32	1/16	9/32
-008	.176 ±.005	.070 ±.003	4.47 ±0.13	1.78 ±0.08	3/16	1/16	5/16
-009	.208 ±.005	.070 ±.003	5.28 ±0.13	1.78 ±0.08	7/32	1/16	11/32
-010	.239 ±.005	.070 ±.003	6.07 ±0.13	1.78 ±0.08	1/4	1/16	3/8
-011	.301 ±.005	.070 ±.003	7.65 ±0.13	1.78 ±0.08	5/16	1/16	7/16
-012	.364 ±.005	.070 ±.003	9.25 ±0.13	1.78 ±0.08	3/8	1/16	1/2
-013	.426 ±.005	.070 ±.003	10.82 ±0.13	1.78 ±0.08	7/16	1/16	9/16
-014	.489 ±.005	.070 ±.003	12.42 ±0.13	1.78 ±0.08	1/2	1/16	5/8
-015	.551 ±.007	.070 ±.003	14.00 ±0.18	1.78 ±0.08	9/16	1/16	11/16
-016	.614 ±.009	.070 ±.003	15.60 ±0.23	1.78 ±0.08	5/8	1/16	3/4
-017	.676 ±.009	.070 ±.003	17.17 ±0.23	1.78 ±0.08	11/16	1/16	13/16
-018	.739 ±.009	.070 ±.003	18.77 ±0.23	1.78 ±0.08	3/4	1/16	7/8
-019	.801 ±.009	.070 ±.003	20.35 ±0.23	1.78 ±0.08	13/16	1/16	15/16
-020	.864 ±.009	.070 ±.003	21.95 ±0.23	1.78 ±0.08	7/8	1/16	1
-021	.926 ±.009	.070 ±.003	23.52 ±0.23	1.78 ±0.08	15/16	1/16	1-1/16
-022	.989 ±.010	.070 ±.003	25.12 ±0.25	1.78 ±0.08	1	1/16	1-1/8
-023	1.051 ±.010	.070 ±.003	26.70 ±0.25	1.78 ±0.08	1-1/16	1/16	1-3/16
-024	1.114 ±.010	.070 ±.003	28.30 ±0.25	1.78 ±0.08	1-1/8	1/16	1-1/4
-025	1.176 ±.011	.070 ±.003	29.87 ±0.28	1.78 ±0.08	1-3/16	1/16	1-5/16
-026	1.239 ±.011	.070 ±.003	31.47 ±0.28	1.78 ±0.08	1-1/4	1/16	1-3/8
-027	1.301 ±.011	.070 ±.003	33.05 ±0.28	1.78 ±0.08	1-5/16	1/16	1-7/16
-028	1.364 ±.013	.070 ±.003	34.65 ±0.33	1.78 ±0.08	1-3/8	1/16	1-1/2
-029	1.489 ±.013	.070 ±.003	37.82 ±0.33	1.78 ±0.08	1-1/2	1/16	1-5/8
-030	1.614 ±.013	.070 ±.003	41.00 ±0.33	1.78 ±0.08	1-5/8	1/16	1-3/4
-031	1.739 ±.015	.070 ±.003	44.17 ±0.38	1.78 ±0.08	1-3/4	1/16	1-7/8
-032	1.864 ±.015	.070 ±.003	47.35 ±0.38	1.78 ±0.08	1-7/8	1/16	2
-033	1.989 ±.018	.070 ±.003	50.52 ±0.46	1.78 ±0.08	2	1/16	2-1/8
-034	2.114 ±.018	.070 ±.003	53.70 ±0.46	1.78 ±0.08	2-1/8	1/16	2-1/4
-035	2.239 ±.018	.070 ±.003	56.87 ±0.46	1.78 ±0.08	2-1/4	1/16	2-3/8
-036	2.364 ±.018	.070 ±.003	60.05 ±0.46	1.78 ±0.08	2-3/8	1/16	2-1/2
-037	2.489 ±.018	.070 ±.003	63.22 ±0.46	1.78 ±0.08	2-1/2	1/16	2-5/8
-038	2.614 ±.020	.070 ±.003	66.40 ±0.51	1.78 ±0.08	2-5/8	1/16	2-3/4
-039	2.739 ±.020	.070 ±.003	69.57 ±0.51	1.78 ±0.08	2-3/4	1/16	2-7/8
-040	2.864 ±.020	.070 ±.003	72.75 ±.051	1.78 ±0.08	2-7/8	1/16	3
-041	2.989 ±.024	.070 ±.003	75.92 ±0.61	1.78 ±0.08	3	1/16	3-1/8
-042	3.239 ±.024	.070 ±.003	82.27 ±0.61	1.78 ±0.08	3-1/4	1/16	3-3/8
-043	3.489 ±.024	.070 ±.003	88.62 ±0.61	1.78 ±0.08	3-1/2	1/16	3-5/8
-044	3.739 ±.027	.070 ±.003	94.97 ±0.69	1.78 ±0.08	3-3/4	1/16	3-7/8
-045	3.989 ±.027	.070 ±.003	101.32 ±0.69	1.78 ±0.08	4	1/16	4-1/8
-046	4.239 ±.030	.070 ±.003	107.67 ±0.76	1.78 ±0.08	4-1/4	1/16	4-3/8
-047	4.489 ±.030	.070 ±.003	114.02 ±0.76	1.78 ±0.08	4-1/2	1/16	4-5/8
-048	4.739 ±.030	.070 ±.003	120.37 ±0.76	1.78 ±0.08	4-3/4	1/16	4-7/8
-049	4.989 ±.037	.070 ±.003	126.72 ±0.94	1.78 ±0.08	5	1/16	5-1/8
-050	5.239 ±.037	.070 ±.003	133.07 ±0.94	1.78 ±0.08	5-1/4	1/16	5-3/8

AS-568A DASH #	Actual I.D. Inches	Actual C.S. Inches	Actual I.D. Millimeters	Actual C.S. Milimeters	Nominal Reference I.D.	Nominal Reference C.S.	Nominal Reference O.D.
-102	.049 ±.005	.103 ±.003	1.24 ±0.13	2.62 ± 0.08	1/16	3/32	1/4
-103	.081 ±.005	.103 ±.003	2.06 ±0.13	2.62 ± 0.08	3/32	3/32	9/32
-104	.112 ±.005	.103 ±.003	2.84 ±0.08	2.62 ± 0.08	1/8	3/32	5/16
-105	.143 ±.005	.103 ±.003	3.63 ±0.13	2.62 ± 0.08	5/32	3/32	11/32
-106	.174 ±.005	.103 ±.003	4.42 ±0.13	2.62 ± 0.08	3/16	3/32	3/8
-107	.206 ±.005	.103 ±.003	5.23 ±0.13	2.62 ± 0.08	7/32	3/32	13/32
-108	.237 ±.005	.103 ±.003	6.02 ±0.13	2.62 ± 0.08	1/4	3/32	7/16
-109	.299 ±.005	.103 ±.003	7.59 ±0.13	2.62 ± 0.08	5/16	3/32	1/2
-110	.362 ±.005	.103 ±.003	9.19 ±0.13	2.62 ± 0.08	3/8	3/32	9/16
-111	.424 ±.005	.103 ±.003	10.77 ±0.13	2.62 ± 0.08	7/16	3/32	5/8
-112	.487 ±.005	.103 ±.003	12.37 ±0.13	2.62 ± 0.08	1/2	3/32	11/16
-113	.549 ±.007	.103 ±.003	13.94 ±0.18	2.62 ± 0.08	9/16	3/32	3/4
-114	.612 ±.009	.103 ±.003	15.54 ±0.23	2.62 ± 0.08	5/8	3/32	13/16
-115	.674 ±.009	.103 ±.003	17.12 ±0.23	2.62 ± 0.08	11/16	3/32	7/8
-116	.737 ±.009	.103 ±.003	18.72 ±0.23	2.62 ± 0.08	3/4	3/32	15/16
-117	.799 ±.010	.103 ±.003	20.30 ±0.25	2.62 ± 0.08	13/16	3/32	1
-118	.862 ±.010	.103 ±.003	21.89 ±0.25	2.62 ± 0.08	7/8	3/32	1-1/16
-119	.924 ±.010	.103 ±.003	23.47 ±0.25	2.62 ± 0.08	15/16	3/32	1-1/8
-120	.987 ±.010	.103 ±.003	25.07 ±0.25	2.62 ± 0.08	1	3/32	1-3/16
-121	1.049 ±.010	.103 ±.003	26.64 ±0.25	2.62 ± 0.08	1-1/16	3/32	1-1/4
-122	1.112 ±.010	.103 ±.003	28.24 ±0.25	2.62 ± 0.08	1-1/8	3/32	1-5/16
-123	1.174 ±.012	.103 ±.003	29.82 ±0.30	2.62 ± 0.08	1-3/16	3/32	1-3/8
-124	1.237 ±.012	.103 ±.003	31.42 ±0.30	2.62 ± 0.08	1-1/4	3/32	1-7/16
-125	1.299 ±.012	.103 ±.003	32.99 ±0.30	2.62 ± 0.08	1-5/16	3/32	1-1/2
-126	1.362 ±.012	.103 ±.003	34.59 ±0.30	2.62 ± 0.08	1-3/8	3/32	1-9/16
-127	1.424 ±.012	.103 ±.003	36.17 ±0.30	2.62 ± 0.08	1-7/16	3/32	1-5/8
-128	1.487 ±.012	.103 ±.003	37.77 ±0.30	2.62 ± 0.08	1-1/2	3/32	1-11/16
-129	1.549 ±.015	.103 ±.003	39.34 ±0.38	2.62 ± 0.08	1-9/16	3/32	1-3/4
-130	1.612 ±.015	.103 ±.003	40.94 ±0.38	2.62 ± 0.08	1-5/8	3/32	1-13/16
-131	1.674 ±.015	.103 ±.003	42.52 ±0.38	2.62 ± 0.08	1-11/16	3/32	1-7/8
-132	1.737 ±.015	.103 ±.003	44.12 ±0.38	2.62 ± 0.08	1-3/4	3/32	1-15/16
-133	1.799 ±.003	.103 ±.003	45.69 ±0.38	2.62 ± 0.08	1-13/16	3/32	2
-134	1.862 ±.015	.103 ±.003	47.30 ±0.38	2.62 ± 0.08	1-7/8	3/32	2-1/16
-135	1.925 ±.017	.103 ±.003	48.90 ±0.43	2.62 ± 0.08	1-15/16	3/32	2-1/8
-136	1.987 ±.017	.103 ±.003	50.47 ±0.43	2.62 ± 0.08	2	3/32	2-3/16
-137	2.050 ±.017	.103 ±.003	52.07 ±0.43	2.62 ± 0.08	2-1/16	3/32	2-1/4
-138	2.112 ±.017	.103 ±.003	53.64 ±0.43	2.62 ± 0.08	2-1/8	3/32	2-5/16
-139	2.175 ±.017	.103 ±.003	55.25 ±0.43	2.62 ± 0.08	2-3/16	3/32	2-3/8
-140	2.237 ±.017	.103 ±.003	56.82 ±0.43	2.62 ± 0.08	2-1/4	3/32	2-7/16
-141	2.300 ±.020	.103 ±.003	58.42 ±0.51	2.62 ± 0.08	2-5/16	3/32	2-1/2
-142	2.362 ±.020	.103 ± 003	59.99 ±0.51	2.62 ± 0.08	2-3/8	3/32	2-9/16
-143	2.425 ±.020	.103 ±.003	61.60 ±0.51	2.62 ± 0.08	2-7/16	3/32	2-5/8
-144	2.487 ±.020	.103 ±.003	63.17 ±0.51	2.62 ± 0.08	2-1/2	3/32	2-11/16
-145	2.550 ±.020	.103 ±.003	64.77 ±0.51	2.62 ± 0.08	2-9/16	3/32	2-3/4
-146	2.612 ±.020	.103 ±.003	66.34 ±0.51	2.62 ± 0.08	2-5/8	3/32	2-13/16
-147	2.675 ±.022	.103 ±.003	67.95 ±0.56	2.62 ± 0.08	2-11/16	3/32	2-7/8
-148	2.737 ±.022	.103 ±.003	69.52 ±0.56	2.62 ± 0.08	2-3/4	3/32	2-15/16
-149	2.800 ±.022	.103 ±.003	71.12 ±0.56	2.62 ± 0.08	2-13/16	3/32	3
-150	2.862 ±.022	.103 ±.003	72.69 ±0.56	2.62 ± 0.08	2-7/8	3/32	3-1/16
-151	2.987 ±.024	.103 ±.003	75.87 ±0.61	2.62 ± 0.08	3	3/32	3-3/16
-152	3.237 ±.024	.103 ±.003	82.22 ±0.61	2.62 ± 0.08	3-1/4	3/32	3-7/16
-153	3.487 ±.024	.103 ±.003	88.57 ±0.61	2.62 ± 0.08	3-1/2	3/32	3-11/16
-154	3.737 ±.028	.103 ±.003	94.92 ±0.71	2.62 ± 0.08	3-3/4	3/32	3-15/16
-155	3.987 ±.028	.103 ±.003	101.27 ±0.71	2.62 ± 0.08	4	3/32	4-3/16
-156	4.237 ±.030	.103 ±.003	107.62 ±0.76	2.62 ± 0.08	4-1/4	3/32	4-7/16
-157	4.487 ±.030	.103 ±.003	113.97 ±0.76	2.62 ± 0.08	4-1/2	3/32	4-11/16
-158	4.737 ±.030	.103 ±.003	120.32 ±0.76	2.62 ± 0.08	4-3/4	3/32	4-15/16
-159	4.987 ±.035	.103 ±.003	126.67 ±0.89	2.62 ± 0.08	5	3/32	5-3/16
-160	5.237 ±.035	.103 ±.003	133.02 ±0.89	2.62 ± 0.08	5-1/4	3/32	5-7/16
-161	5.487 ±.035	.103 ±.003	139.37 ±0.89	2.62 ± 0.08	5-1/2	3/32	5-11/16
-162	5.737 ±.035	.103 ±.003	145.72 ±0.89	2.62 ± 0.08	5-3/4	3/32	5-15/16
-163	5.987 ±.035	.103 ±.003	152.07 ±0.89	2.62 ± 0.08	6	3/32	6-3/16
-164	6.237 ±.040	.103 ±.003	158.42 ±1.02	2.62 ± 0.08	6-1/4	3/32	6-7/16
-165	6.487 ±.040	.103 ±.003	164.77 ±1.02	2.62 ± 0.08	6-1/2	3/32	6-11/16
-166	6.737 ±.040	.103 ±.003	171.12 ±1.02	2.62 ± 0.08	6-3/4	3/32	6-15/16
-167	6.987 ±.040	.103 ±.003	177.47 ±1.02	2.62 ± 0.08	7	3/32	7-3/16
-168	7.237 ±.045	.103 ±.003	183.82 ±1.14	2.62 ± 0.08	7-1/4	3/32	7-7/16
-169	7.487 ±.045	.103 ±.003	190.17 ±1.14	2.62 ± 0.08	7-1/2	3/32	7-11/16
-170	7.737 ±.045	.103 ±.003	196.52 ±1.14	2.62 ± 0.08	7-3/4	3/32	7-15/16
-171	7.987 ±.045	.103 ±.003	202.87 ±1.14	2.62 ± 0.08	8	3/32	8-3/16
-172	8.237 ±.050	.103 ±.003	209.22 ±1.27	2.62 ± 0.08	8-1/4	3/32	8-7/16
-173	8.487 ±.050	.103 ±.003	215.57 ±1.27	2.62 ± 0.08	8-1/2	3/32	8-11/16
-174	8.737 ±.050	.103 ±.003	221.92 ±1.27	2.62 ± 0.08	8-3/4	3/32	8-15/16
-175	8.987 ±.050	.103 ±.003	228.27 ±1.27	2.62 ± 0.08	9	3/32	9-3/16
-176	9.237 ±.055	.103 ±.003	234.62 ±1.40	2.62 ± 0.08	9-1/4	3/32	9-7/16
-177	9.487 ±.055	.103 ±.003	240.97 ±1.40	2.62 ± 0.08	9-1/2	3/32	9-11/16
-178	9.737 ±.055	.103 ±.003	247.32 ±1.40	2.62 ± 0.08	9-3/4	3/32	9-15/16

AS-568A DASH #	Actual I.D. Inches	Actual C.S. Inches	Actual I.D. Millimeters	Actual C.S. Milimeters	Nominal Reference I.D.	Nominal Reference C.S.	Nominal Reference O.D.
-201	.171 ±.005	.139 ±.004	4.34 ±0.13	3.53 ±.010	3/16	1/8	7/16
-202	.234 ±.005	.139 ±.004	5.94 ±0.13	3.53 ±0.10	1/4	1/8	1/2
-203	.296 ±.005	.139 ±.004	7.52 ±0.13	3.53 ±0.10	5/16	1/8	9/16
-204	.359 ±.005	.139 ±.004	9.12 ±0.13	3.53 ±0.10	3/8	1/8	5/8
-205	.421 ±.005	.139 ±.004	10.69 ±0.13	3.53 ±0.10	7/16	1/8	11/16
-206	.484 ±.005	.139 ±.004	12.29 ±0.13	3.53 ±0.10	1/2	1/8	3/4
-207	.546 ±.007	.139 ±.004	13.87 ±0.17	3.53 ±0.10	9/16	1/8	13/16
-208	.609 ±.009	.139 ±.004	15.47 ±0.23	3.53 ±0.10	5/8	1/8	7/8
-209	.671 ±.009	.139 ±.004	17.04 ±0.23	3.53 ±0.10	11/16	1/8	15/16
-210	.734 ±.010	.139 ±.004	18.64 ±0.25	3.53 ±0.10	3/4	1/8	1
-211	.796 ±.010	.139 ±.004	20.22 ±0.25	3.53 ±0.10	13/16	1/8	1-1/16
-212	.859 ±.010	.139 ±.004	21.82 ±0.25	3.53 ±0.10	7/8	1/8	1-1/8
-213	.921 ±.010	.139 ±.004	23.39 ±0.25	3.53 ±0.10	15/16	1/8	1-3/16
-214	.984 ±.010	.139 ±.004	25.00 ±0.25	3.53 ±0.10	1	1/8	1-1/4
-215	1.046 ±.010	.139 ±.004	26.57 ±0.25	3.53 ±0.10	1-1/16	1/8	1-5/16
-216	1.109 ±.012	.139 ±.004	28.17 ±0.30	3.53 ±0.10	1-1/8	1/8	1-3/8
-217	1.171 ±.012	.139 ±.004	29.74 ±.030	3.53 ±0.10	1-3/16	1/8	1-7/16
-218	1.234 ±.012	.139 ±.004	31.34 ±0.30	3.53 ±0.10	1-1/4	1/8	1-1/2
-219	1.296 ±.012	.139 ±.004	32.92 ±0.30	3.53 ±0.10	1-5/16	1/8	1-9/16
-220	1.359 ±.012	.139 ±.004	34.52 ±0.30	3.53 ±0.10	1-3/8	1/8	1-5/8
-221	1.421 ±.012	.139 ±.004	36.09 ±0.30	3.53 ±0.10	1-7/16	1/8	1-11/16
-222	1.484 ±.015	.139 ±.004	37.69 ±0.38	3.53 ±0.10	1-1/2	1/8	1-3/4
-223	1.609 ±.015	.139 ±.004	40.87 ±0.38	3.53 ±0.10	1-5/8	1/8	1-7/8
-224	1.734 ±.015	.139 ±.004	44.04 ±0.38	3.53 ±0.10	1-3/4	1/8	2
-225	1.859 ±.018	.139 ±.004	47.22 ±0.46	3.53 ±0.10	1-7/8	1/8	2-1/8
-226	1.984 ±0.18	.139 ±.004	50.39 ±0.46	3.53 ±0.10	2	1/8	2-1/4
-227	2.109 ±.018	.139 ±.004	53.57 ±0.46	3.53 ±0.10	2-1/8	1/8	2-3/8
-228	2.234 ±.020	.139 ±.004	56.74 ±0.50	3.53 ±0.10	2-1/4	1/8	2-1/2
-229	2.359 ±.020	.139 ±.004	59.92 ±0.50	3.53 ±0.10	2-3/8	1/8	2-5/8
-230	2.484 ±.020	.139 ±.004	63.09 ±0.50	3.53 ±0.10	2-1/2	1/8	2-3/4
-231	2.609 ±0.20	.139 ±.004	66.27 ±0.50	3.53 ±0.10	2-5/8	1/8	2-7/8
-232	2.734 ±.024	.139 ±.004	69.44 ±0.61	3.53 ±0.10	2-3/4	1/8	3
-233	2.859 ±.024	.139 ±.004	72.62 ±.061	3.53 ±0.10	2-7/8	1/8	3-1/8
-234	2.984 ±.024	.139 ±.004	75.79 ±.061	3.53 ±0.10	3	1/8	3-1/4
-235	3.109 ±.024	.139 ±.004	78.97 ±0.61	3.53 ±0.10	3-1/8	1/8	3-3/8
-236	3.234 ±.024	.139 ±.004	82.14 ±0.61	3.53 ±0.10	3-1/4	1/8	3-1/2
-237	3.359 ±.024	.139 ±.004	85.32 ±0.61	3.53 ±0.10	3-3/8	1/8	3-5/8
-238	3.484 ±.024	.139 ±.004	88.49 ±0.61	3.53 ±0.10	3-1/2	1/8	3-3/4
-239	3.609 ±.028	.139 ±.004	91.67 ±0.71	3.53 ±0.10	3-5/8	1/8	3-7/8
-240	3.734 ±.028	.139 ±.004	98.02 ±.071	3.53 ±0.10	3-3/4	1/8	4
-241	3.859 ±.028	.139 ±.004	94.84 ±.071	3.53 ±0.10	3-7/8	1/8	4-1/8
-242	3.984 ±.028	.139 ±.004	101.19 ±0.70	3.53 ±0.10	4	1/8	4-1/4
-243	4.109 ±.028	.139 ±.004	104.37 ±0.71	3.53 ±0.10	4-1/8	1/8	4-3/8
-244	4.234 ±.030	.139 ±.004	107.54 ±0.76	3.53 ±0.10	4-1/4	1/8	4-1/2
-245	4.359 ±.030	.139 ±.004	110.72 ±0.76	3.53 ±0.10	4-3/8	1/8	4-5/8
-246	4.484 ±0.30	.139 ±.004	113.89 ±0.76	3.53 ±0.10	4-1/2	1/8	4-3/4
-247	4.609 ±.030	.139 ±.004	117.07 ±0.76	3.53 ±0.10	4-5/8	1/8	4-7/8
-248	4.734 ±.030	.139 ±.004	120.24 ±0.76	3.53 ±.010	4-3/4	1/8	5
-249	4.859 ±.035	.139 ±.004	123.42 ±0.89	3.53 ±0.10	4-7/8	1/8	5-1/8
-250	4.984 ±.035	.139 ±.004	126.59 ±0.89	3.53 ±0.10	5	1/8	5-1/4
-251	5.109 ±.035	.139 ±.004	129.77 ±0.89	3.53 ±0.10	5-1/8	1/8	5-3/8
-252	5.234 ±.035	.139 ±.004	132.94 ±0.89	3.53 ±0.10	5-1/4	1/8	5-1/2
-253	5.359 ±.035	.139 ±.004	136.12 ±0.89	3.53 ±0.10	5-3/8	1/8	5-5/8
-254	5.484 ±.035	.139 ±.004	139.29 ±0.89	3.53 ±0.10	5-1/2	1/8	5-3/4
-255	5.609 ±.035	.139 ±.004	142.47 ±0.89	3.53 ±0.10	5-5/8	1/8	5-7/8
-256	5.734 ±.035	.139 ±.004	145.65 ±0.89	3.53 ±0.10	5-3/4	1/8	6
-257	5.859 ±.035	.139 ±.004	148.82 ±0.89	3.53 ±0.10	5-7/8	1/8	6-1/8
-258	5.984 ±.035	.139 ±.004	151.99 ±0.89	3.53 ±0.10	6	1/8	6-1/4
-259	6.234 ±.040	.139 ±.004	158.34 ±1.02	3.53 ±0.10	6-1/4	1/8	6-1/2
-260	6.484 ±.040	.139 ±.004	164.69 ±1.02	3.53 ±0.10	6-1/2	1/8	6-3/4
-261	6.734 ±.040	.139 ±.004	171.04 ±1.02	3.53 ±0.10	6-3/4	1/8	7
-262	6.984 ±0.40	.139 ±.004	177.39 ±1.02	3.53 ±0.10	7	1/8	7-1/4
-263	7.234 ±.045	.139 ±.004	183.74 ±1.14	3.53 ±0.10	7-1/4	1/8	7-1/2
-264	7.484 ±.045	.139 ±.004	190.09 ±1.14	3.53 ±0.10	7-1/2	1/8	7-3/4
-265	7.734 ±.045	.139 ±.004	196.44 ±1.14	3.53 ±0.10	7-3/4	1/8	8
-266	7.984 ±.045	.139 ±.004	202.79 ±1.14	3.53 ±0.10	8	1/8	8-1/4
-267	8.234 ±.050	.139 ±.004	209.14 ±1.27	3.53 ±0.10	8-1/4	1/8	8-1/2
-268	8.484 ±.050	.139 ±.004	215.49 ±1.27	3.53 ±0.10	8-1/2	1/8	8-3/4
-269	8.734 ±.050	.139 ±.004	221.84 ±1.27	3.53 ±0.10	8-3/4	1/8	9
-270	8.984 ±.050	.139 ±.004	228.19 ±1.27	3.53 ±0.10	9	1/8	9-1/4
-271	9.234 ±.055	.139 ±.004	234.54 ±1.40	3.53 ±0.10	9-1/4	1/8	9-1/2
-272	9.484 ±.055	.139 ±.004	240.89 ±1.40	3.53 ±0.10	9-1/2	1/8	9-3/4
-273	9.734 ±.055	.139 ±.004	247.24 ±1.40	3.53 ±0.10	9-3/4	1/8	10
-274	9.984 ±.055	.139 ±.004	253.59 ±1.40	3.53 ±0.10	10	1/8	10-1/4
-275	10.484 ±.065	.139 ±.004	266.29 ±1.40	3.53 ±0.10	10-1/2	1/8	10-3/4
-276	10.984 ±.065	.139 ±.004	278.99 ±1.65	3.53 ±0.10	11	1/8	11-1/4
-277	11.484 ±.065	.139 ±.004	291.69 ±1.65	3.53 ±0.10	11-1/2	1/8	11-3/4
-278	11.984 ±.065	.139 ±.004	304.39 ±1.65	3.53 ±0.10	12	1/8	12-1/4
-279	12.984 ±.065	.139 ±.004	329.79 ±1.65	3.53 ±0.10	13	1/8	13-1/4
-280	13.984 ±.065	.139 ±.004	355.19 ±1.65	3.53 ±0.10	14	1/8	14-1/4
-281	14.984 ±.065	.139 ±.004	380.59 ±1.65	3.53 ±0.10	15	1/8	15-1/4
-282	15.995 ±.075	.139 ±.004	405.26 ±1.65	3.53 ±0.10	16	1/8	16-1/4
-283	16.955 ±.080	.139 ±.004	430.66 ±2.03	3.53 ±0.10	17	1/8	17-1/4
-284	19.955 ±.085	.139 ±.004	456.06 ±2.16	3.53 ±0.10	18	1/8	18-1/4

AS-568A DASH #	Actual I.D. Inches	Actual C.S. Inches	Actual I.D. Millimeters	Actual C.S. Milimeters	Nominal Reference I.D.	Nominal Reference C.S.	Nominal Reference O.D.
-309	.412 ±.005	.210 ±.005	10.46 ±0.13	5.33 ±.013	7/16	3/16	13/16
-310	.475 ±.005	.210 ±.005	12.07 ±.0.13	5.33 ±.013	1/2	3/16	7/8
-311	.537 ±.007	.210 ±.005	13.64 ±.018	5.33 ±.013	9/16	3/16	15/16
-312	.600 ±.009	.210 ±.005	15.24 ±0.23	5.33 ±.013	5/8	3/16	1
-313	.662 ±.009	.210 ±.005	16.81 ±0.23	5.33 ±.013	11/16	3/16	1-1/16
-314	.725 ±.010	.210 ±.005	18.42 ±0.25	5.33 ±.013	3/4	3/16	1-1/8
-315	.787 ±.010	.210 ±.005	19.99 ±0.25	5.33 ±.013	13/16	3/16	1-3/16
-316	.850 ±.010	.210 ±.005	21.59 ±0.25	5.33 ±.013	7/8	3/16	1-1/4
-317	.912 ±.010	.210 ±.005	23.16 ±0.25	5.33 ±.013	15/16	3/16	1-5/16
-318	.975 ±.010	.210 ±.005	24.77 ±0.25	5.33 ±.013	1	3/16	1-3/8
-319	1.037 ±.010	.210 ±.005	26.34 ±0.25	5.33 ±.013	1-1/16	3/16	1-7/16
-320	1.100 ±.012	.210 ±.005	27.94 ±0.30	5.33 ±.013	1-1/8	3/16	1-1/2
-321	1.162 ±.012	.210 ±.005	29.51 ±0.30	5.33 ±.013	1-3/16	3/16	1-9/16
-322	1.225 ±.012	.210 ±.005	31.12 ±0.30	5.33 ±.013	1-1/4	3/16	1-5/8
-323	1.287 ±.012	.210 ±.005	32.69 ±0.30	5.33 ±.013	1-5/16	3/16	1-11/16
-324	1.350 ±.012	.210 ±.005	34.29 ±0.30	5.33 ±.013	1-3/8	3/16	1-3/4
-325	1.475 ±.015	.210 ±.005	37.47 ±0.38	5.33 ±.013	1-1/2	3/16	1-7/8
-326	1.600 ±.015	.210 ±.005	40.64 ±0.38	5.33 ±.013	1-5/8	3/16	2
-327	1.725 ±.015	.210 ±.005	43.82 ±0.38	5.33 ±.013	1-3/4	3/16	2-1/8
-328	1.850 ±.015	.210 ±.005	46.99 ±.0.38	5.33 ±.013	1-7/8	3/16	2-1/4
-329	1.975 ±.018	.210 ±.005	50.17 ±0.46	5.33 ±.013	2	3/16	2-3/8
-330	2.100 ±.018	.210 ±.005	53.34 ±0.46	5.33 ±.013	2-1/8	3/16	2-1/2
-331	2.225 ±.018	.210 ±.005	56.52 ±0.46	5.33 ±.013	2-1/4	3/16	2-5/8
-332	2.350 ±.018	.210 ±.005	59.69 ±0.46	5.33 ±.013	2-3/8	3/16	2-3/4
-333	2.475 ±.020	.210 ±.005	62.87 ±0.51	5.33 ±.013	2-1/2	3/16	2-7/8
-334	2.600 ±.020	.210 ±.005	66.04 ±0.51	5.33 ±.013	2-5/8	3/16	3
-335	2.725 ±.020	.210 ±.005	69.22 ±0.51	5.33 ±.013	2-3/4	3/16	3-1/8
-336	2.850 ±.020	.210 ±.005	72.39 ±0.51	5.33 ±.013	2-7/8	3/16	3-1/4
-337	2.975 ±.024	.210 ±.005	75.57 ±0.61	5.33 ±.013	3	3/16	3-3/8
-338	3.100 ±.024	.210 ±.005	78.74 ±0.61	5.33 ±.013	3-1/8	3/16	3-1/2
-339	3.225 ±.024	.210 ±.005	91.92 ±0.61	5.33 ±.013	3-1/4	3/16	3-5/8
-340	3.350 ±.024	.210 ±.005	85.09 ±0.61	5.33 ±.013	3-3/8	3/16	3-3/4
-341	3.475 ±.024	.210 ±.005	88.27 ±0.61	5.33 ±.013	3-1/2	3/16	3-7/8
-342	3.600 ±.028	.210 ±.005	91.44 ±0.71	5.33 ±.013	3-5/8	3/16	4
-343	3.725 ±.028	.210 ±.005	94.62 ±0.71	5.33 ±.013	3-3/4	3/16	4-1/8
-344	3.850 ±.028	.210 ±.005	97.79 ±0.71	5.33 ±.013	3-7/8	3/16	4-1/4
-345	3.975 ±.028	.210 ±.005	100.97 ±0.71	5.33 ±.013	4-3/16	3/16	4-3/8
-346	4.100 ±.028	.210 ±.005	104.14 ±0.71	5.33 ±.013	4-1/8	3/16	4-1/2
-347	4.225 ±.030	.210 ±.005	107.32 ±0.76	5.33 ±.013	4-1/4	3/16	4-5/8
-348	4.350 ±.030	.210 ±.005	110.49 ±0.76	5.33 ±.013	4-3/8	3/16	4-3/4
-349	4.475 ±.030	.210 ±.005	113.67 ±0.76	5.33 ±.013	4-1/2	3/16	4-7/8
-350	4.600 ±.030	.210 ±.005	116.84 ±0.76	5.33 ±.013	4-5/8	3/16	5
-351	4.725 ±.030	.210 ±.005	120.02 ±0.76	5.33 ±.013	4-3/4	3/16	5-1/8
-352	4.850 ±.030	.210 ±.005	123.19 ±0.76	5.33 ±.013	4-7/8	3/16	5-1/4
-353	4.975 ±.037	.210 ±.005	126.37 ±0.94	5.33 ±.013	5	3/16	5-3/8
-354	5.100 ±.037	.210 ±.005	129.54 ±0.94	5.33 ±.013	5-1/8	3/16	5-1/2
-355	5.225 ±.037	.210 ±.005	132.72 ±0.94	5.33 ±.013	5-1/4	3/16	5-5/8
-356	5.350 ±.037	.210 ±.005	135.89 ±0.94	5.33 ±.013	5-3/8	3/16	5-3/4
-357	5.475 ±.037	.210 ±.005	139.07 ±0.94	5.33 ±.013	5-1/2	3/16	5-7/8
-358	5.600 ±.037	.210 ±.005	142.24 ±0.94	5.33 ±.013	5-5/8	3/16	6
-359	5.725 ±.037	.210 ±.005	145.42 ±0.94	5.33 ±.013	5-3/4	3/16	6-1/8
-360	5.850 ±.037	.210 ±.005	148.59 ±0.94	5.33 ±.013	5-7/8	3/16	6-1/4
-361	5.975 ±.037	.210 ±.005	151.77 ±0.94	5.33 ±.013	6	3/16	6-3/8
-362	6.255 ±.040	.210 ±.005	158.12 ±1.02	5.33 ±.013	6 1/4	3/16	6-5/8
-363	6.475 ±.040	.210 ±.005	164.47 ±1.02	5.33 ±.013	6-1/2	3/16	6-7/8
-364	6.725 ±.040	.210 ±.005	170.82 ±1.02	5.33 ±.013	6-3/4	3/16	7-1/8
-365	6.975 ±.040	.210 ±.005	177.17 ±1.02	5.33 ±.013	7	3/16	7-3/8
-366	7.225 ±.045	.210 ±.005	183.52 ±1.14	5.33 ±.013	7-1/4	3/16	7-5/8
-367	7.475 ±.045	.210 ±.005	189.87 ±1.14	5.33 ±.013	7-1/2	3/16	7-7/8
-368	7.725 ±.045	.210 ±.005	196.22 ±1.14	5.33 ±.013	7-3/4	3/16	8-1/8
-369	7.975 ±.045	.210 ±.005	202.57 ±1.14	5.33 ±.013	8	3/16	8-3/8
-370	8.225 ±.050	.210 ±.005	208.92 ±1.27	5.33 ±.013	8-1/4	3/16	8-5/8
-371	8.475 ±.050	.210 ±.005	215.27 ±1.27	5.33 ±.013	8-1/2	3/16	8-7/8
-372	8.752 ±.050	.210 ±.005	221.62 ±1.27	5.33 ±.013	8-3/4	3/16	9-1/8
-373	8.975 ±.050	.210 ±.005	227.97 ±1.27	5.33 ±.013	9	3/16	9-3/8
-374	9.225 ±.055	.210 ±.005	234.32 ±1.40	5.33 ±.013	9-1/4	3/16	9-5/8
-375	9.475 ±.055	.210 ±.005	240.67 ±1.40	5.33 ±.013	9-1/2	3/16	9-7/8
-376	9.725 ±.055	.210 ±.005	247.02 ±1.40	5.33 ±.013	9-3/4	3/16	10-1/8
-377	9.975 ±.055	.210 ±.005	253.37 ±1.40	5.33 ±.013	10	3/16	10-3/8
-378	10.475 ±.060	.210 ±.005	266.07 ±1.52	5.33 ±.013	10-1/2	3/16	10-7/8
-379	10.975 ±.060	.210 ±.005	278.77 ±1.52	5.33 ±.013	11	3/16	11-3/8
-380	11.475 ±.065	.210 ±.005	291.47 ±1.65	5.33 ±.013	11-1/2	3/16	11-7/8
-381	11.975 ±.065	.210 ±.005	304.17 ±1.65	5.33 ±.013	12	3/16	12-3/8
-382	12.975 ±.065	.210 ±.005	329.57 ±1.65	5.33 ±.013	13	3/16	13-3/8
-383	13.975 ±.070	.210 ±.005	354.97 ±1.78	5.33 ±.013	14	3/16	14-3/8
-384	14.975 ±.070	.210 ±.005	380.37 ±1.78	5.33 ±.013	15	3/16	15-3/8
-385	15.955 ±.075	.210 ±.005	405.26 ±1.91	5.33 ±.013	16	3/16	16-3/8
-386	16.955 ±.080	.210 ±.005	430.66 ±2.03	5.33 ±.013	17	3/16	17-3/8
-387	17.955 ±.085	.210 ±.005	456.06 ±2.16	5.33 ±.013	18	3/16	18-3/8
-388	18.955 ±.090	.210 ±.005	481.41 ±2.29	5.33 ±.013	19	3/16	19-3/8
-389	19.955 ±.095	.210 ±.005	506.81 ±2.41	5.33 ±.013	20	3/16	20-3/8
-390	20.955 ±.095	.210 ±.005	532.21 ±2.41	5.33 ±.013	21	3/16	21-3/8
-391	21.955 ±.100	.210 ±.005	557.61 ±2.54	5.33 ±.013	22	3/16	22-3/8
-392	22.940 ±.105	.210 ±.005	582.68 ±2.67	5.33 ±.013	23	3/16	23-3/8
-393	23.940 ±.110	.210 ±.005	608.08 ±2.79	5.33 ±.013	24	3/16	24-3/8
-394	24.940 ±.115	.210 ±.005	633.48 ±2.92	5.33 ±.013	25	3/16	25-3/8
-395	25.940 ±.120	.210 ±.005	658.88 ±3.05	5.33 ±.013	26	3/16	26-3/8

Standard O-Ring Sizing Chart
AS-568A DASH #	Actual I.D. Inches	Actual C.S. Inches	Actual I.D. Millimeters	Actual C.S. Milimeters	Nominal Reference I.D.	Nominal Reference C.S.	Nominal Reference O.D.
-425	4.475 ±.033	.275 ±.006	113.67 ±0.84	6.99 ±0.15	4-1/2	1/4	5
-426	4.600 ±.033	.275 ±.006	116.84 ±0.84	6.99 ±0.15	4-5/8	1/4	5-1/8
-427	4.725 ±.033	.275 ±.006	120.02 ±0.84	6.99 ±0.15	4-3/4	1/4	5-1/4
-428	4.850 ±.033	.275 ±.006	123.19 ±0.84	6.99 ±0.15	4-7/8	1/4	5-3/8
-429	4.975 ±.037	.275 ±.006	126.37 ±0.94	6.99 ±0.15	5	1/4	5-1/2
-430	5.100 ±.037	.275 ±.006	129.54 ±0.94	6.99 ±0.15	5-1/8	1/4	5-5/8
-431	5.225 ±.037	.275 ±.006	132.72 ±0.94	6.99 ±0.15	5-1/4	1/4	5-3/4
-432	5.350 ±.037	.275 ±.006	135.89 ±.094	6.99 ±0.15	5-3/8	1/4	5-7/8
-433	5.475 ±.037	.275 ±.006	139.07 ±0.94	6.99 ±0.15	5-1/2	1/4	6
-434	5.600 ±.037	.275 ±.006	142.24 ±0.94	6.99 ±0.15	5-5/8	1/4	6-1/8
-435	5.725 ±.037	.275 ±.006	145.42 ±0.94	6.99 ±0.15	5-3/4	1/4	6-1/4
-436	5.850 ±.037	.275 ±.006	148.59 ±0.94	6.99 ±0.15	5-7/8	1/4	6-3/8
-437	5.975 ±.037	.275 ±.006	151.77 ±0.94	6.99 ±0.15	6	1/4	6-1/2
-438	6.225 ±.040	.275 ±.006	158.12 ±1.02	6.99 ±0.15	6-1/4	1/4	6-3/4
-439	6.475 ±.040	.275 ±.006	164.47 ±1.02	6.99 ±0.15	6-1/2	1/4	7
-440	6.725 ±.040	.275 ±.006	170.82 ±1.02	6.99 ±0.15	6-3/4	1/4	7-1/4
-441	6.975 ±.040	.275 ±.006	177.17 ±1.02	6.99 ±0.15	7	1/4	7-1/2
-442	7.225 ±.045	.275 ±.006	183.52 ±1.14	6.99 ±0.15	7-1/4	1/4	7-3/4
-443	7.475 ±.045	.275 ±.006	189.87 ±1.14	6.99 ±0.15	7-1/2	1/4	8
-444	7.725 ±.045	.275 ±.006	196.22 ±1.14	6.99 ±0.15	7-3/4	1/4	8-1/4
-445	7.975 ±.045	.275 ±.006	202.57 ±1.14	6.99 ±0.15	8	1/4	8-1/2
-446	8.475 ±.055	.275 ±.006	215.27 ±1.40	6.99 ±0.15	8-1/2	1/4	9
-447	8.975 ±.055	.275 ±.006	227.97 ±1.40	6.99 ±0.15	9	1/4	9-1/2
-448	9.475 ±.055	.275 ±.006	240.67 ±1.40	6.99 ±0.15	9-1/2	1/4	10
-449	9.975 ±.055	.275 ±.006	253.37 ±1.40	6.99 ±0.15	10	1/4	10-1/2
-450	10.475 ±.060	.275 ±.006	266.07 ±1.52	6.99 ±0.15	10-1/2	1/4	11
-451	10.975 ±.060	.275 ±.006	278.77 ±1.52	6.99 ±0.15	11	1/4	11-1/2
-452	11.475 ±.060	.275 ±.006	291.47 ±1.52	6.99 ±0.15	11-1/2	1/4	12
-453	11.975 ±.060	.275 ±.006	304.17 ±1.52	6.99 ±0.15	12	1/4	12-1/2
-454	12.475 ±.060	.275 ±.006	316.87 ±1.52	6.99 ±0.15	12-1/2	1/4	13
-455	12.975 ±.060	.275 ±.006	329.57 ±1.52	6.99 ±0.15	13	1/4	13-1/2
-456	13.457 ±.070	.275 ±.006	342.27 ±1.78	6.99 ±0.15	13-1/2	1/4	14
-457	13.975 ±.070	.275 ±.006	354.97 ±1.78	6.99 ±0.15	14	1/4	14-1/2
-458	14.475 ±.070	.275 ±.006	367.67 ±1.78	6.99 ±0.15	14-1/2	1/4	15
-459	14.975 ±.070	.275 ±.006	380.37 ±1.78	6.99 ±0.15	15	1/4	15-1/2
-460	15.475 ±.070	.275 ±.006	393.07 ±1.78	6.99 ±0.15	15-1/2	1/4	16
-461	15.955 ±.075	.275 ±.006	405.26 ±1.91	6.99 ±0.15	16	1/4	16-1/2
-462	16.455 ±.075	.275 ±.006	417.96 ±1.91	6.99 ±0.15	16-1/2	1/4	17
-463	16.955 ±.080	.275 ±.006	430.66 ±2.03	6.99 ±0.15	17	1/4	17-1/2
-464	17.455 ±.085	.275 ±.006	443.36 ±2.16	6.99 ±0.15	17-1/2	1/4	18
-465	17.955 ±.085	.275 ±.006	456.06 ±2.16	6.99 ±0.15	18	1/4	18-1/2
-466	18.455 ±.085	.275 ±.006	468.76 ±2.16	6.99 ±0.15	18-1/2	1/4	19
-467	18.955 ±.090	.275 ±.006	481.46 ±2.29	6.99 ±0.15	19	1/4	19-1/2
-468	19.455 ±.090	.275 ±.006	494.16 ±2.29	6.99 ±0.15	19-1/2	1/4	20
-469	19.955 ±.095	.275 ±.006	506.86 ±2.41	6.99 ±0.15	20	1/4	20-1/2
-470	20.955 ±.095	.275 ±.006	532.26 ±2.41	6.99 ±0.15	21	1/4	21-1/2
-471	21.955 ±.100	.275 ±.006	557.66 ±2.54	6.99 ±0.15	22	1/4	22-1/2
-472	22.940 ±.105	.275 ±.006	582.68 ±2.67	6.99 ±0.15	23	1/4	23-1/2
-473	23.940 ±.110	.275 ±.006	608.08 ±2.79	6.99 ±0.15	24	1/4	24-1/2
-474	24.940 ±.115	.275 ±.006	633.48 ±2.92	6.99 ±0.15	25	1/4	25-1/2
-475	25.940 ±.120	.275 ±.006	658.88 ±3.05	6.99 ±0.15	26	1/4	26-1/2

BOSS SEAL SIZE	Actual I.D. Inches	Actual C.S. Inches	Actual I.D. Millimeters	Actual C.S. Milimeters
-901	.185 ±.005	.056 ±.003	4.70 ±0.13	1.42 ±0.08
-902	.239 ±.005	.064 ±.003	6.07 ±0.13	1.63 ±0.08
-903	.301 ±.005	.064 ±.003	7.65 ±0.13	1.63 ±0.08
-904	.351 ±.005	.072 ±.003	8.92 ±0.13	1.83 ±0.08
-905	.414 ±.005	.072 ±.003	10.52 ±0.13	1.83 ±0.08
-906	.468 ±.005	.078 ±.003	11.89 ±0.13	1.98 ±0.08
-907	.530 ±.007	.082 ±.003	13.46 ±0.18	2.08 ±0.08
-908	.644 ±.009	.087 ±.003	16.36 ±0.23	2.21 ±0.08
-909	.706 ±.009	.097 ±.003	17.93 ±0.23	2.46 ±0.08
-910	.755 ±.009	.097 ±.003	19.18 ±0.23	2.46 ±0.08
-911	.863 ±.009	.116 ±.004	21.92 ±0.23	2.95 ±0.10
-912	.924 ±.009	.116 ±.004	23.47 ±0.23	2.95 ±0.10
-913	.986 ±.010	.116 ±.004	25.04 ±0.26	2.95 ±0.10
-914	1.047 ±.010	.116 ±.004	26.59 ±0.26	2.95 ±0.10
-916	1.171 ±.010	.116 ±.004	29.74 ±0.26	2.95 ±0.10
-918	1.355 ±.012	.116 ±.004	34.42 ±0.30	2.95 ±0.10
-920	1.475 ±.014	.116 ±.004	37.47 ±0.36	3.00 ±0.10
-924	1.720 ±.014	.116 ±.004	43.69 ±0.36	3.00 ±0.10
-928	2.090 ±.018	.116 ±.004	53.09 ±0.46	3.00 ±0.10
-932	2.337 ±.018	.116 ±.004	59.36 ±0.46	3.00 ±0.10

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