O-Rings (page 2.7 of 4)

AEROSPACE STANDARD 568 DASH NUMBERS
(-001 thru -050) (-102 thru -150) (-151 thru -219) (-220 thru -269)
(-270 thru -341) (-342 thru -391) (-392 thru -475)

(A) = Size Reference (B) = Volume Cubic Inches (C) = Volume Cubic Centimeters
	Nominal Size Inches			Actual Size Inches			Actual Size Millimeters
(A)	I.D.	O.D.	W	I.D.	W	(B)	I.D.	W	(C)
-392	23	23-3/8	3/8	22.940 + .105	.210 + .005	2.5190	582.65 + 2.65	5.34 + 0.12	41.279
-393	24	24-3/8	3/8	23.940 + .110	.210 + .005	2.6278	608.10 + 2.80	5.34 + 0.12	43.062
-394	25	25-3/8	3/8	24.940 + .115	.210 + .005	2.7366	633.50 + 2.90	5.34 + 0.12	44.845
-395	26	26-3/8	3/8	25.940 + .120	.210 + .005	2.8454	658.85 + 3.05	5.34 + 0.12	46.628
-396 through -424 O-ring sizes not assigned
-425	4-1/2	5	1/4	4.475 + .033	.275 + .006	.8863	113.67 + 0.83	6.98 + 0.15	14.524
-426	4-5/8	5-1/8	1/4	4.600 + .033	.275 + .006	.9097	116.84 + 0.83	6.98 + 0.15	14.907
-427	4-3/4	5-1/4	1/4	4.725 + .033	.275 + .006	.9330	120.02 + 0.83	6.98 + 0.15	15.289
-428	4-7/8	5-3/8	1/4	4.850 + .033	.275 + .006	.9663	123.19 + 0.83	6.98 + 0.15	15.671
-429	5	5-1/2	1/4	4.975 + .037	.275 + .006	.9796	126.37 + 0.93	6.98 + 0.15	16.053
-430	5-1/8	5-5/8	1/4	5.100 + .037	.275 + .006	1.0030	129.54 + 0.93	6.98 + 0.15	16.436
-431	5-1/4	5-3/4	1/4	5.225 + .037	.275 + .006	1.0263	132.72 + 0.93	6.98 + 0.15	16.818
-432	5-3/8	5-7/8	1/4	5.350 + .037	.275 + .006	1.0496	135.89 + 0.93	6.98 + 0.15	17.200
-433	5-1/2	6	1/4	6.475 + .037	.275 + .006	1.0729	139.07 + 0.93	6.98 + 0.15	17.582
-434	5-5/8	6-1/8	1/4	5.600 + .037	.275 + .006	1.0963	142.24 + 0.93	6.98 + 0.15	17.965
-435	5-3/4	6-1/4	1/4	5.725 + .037	.275 + .006	1.196	145.42 + 0.93	6.98 + 0.15	18.347
-436	5-7/8	6-3/8	1/4	5.850 + .037	.275 + .006	1.1429	148.59 + 0.93	6.98 + 0.15	18.729
-437	6	6-1/2	1/4	5.975 + .037	.275 + .006	1.1662	151.77 + 0.93	6.98 + 0.15	19.111
-438	6-1/4	6-3/4	1/4	6.225 + .040	.275 + .006	1.2129	158.12 + 1.01	6.98 + 0.15	19.876
-439	6-1/2	7	1/4	6.475 + .040	.275 + .006	1.2595	164.47 + 1.01	6.98 + 0.15	20.640
-440	6-3/4	7-1/4	1/4	6.725 + .040	.275 + .006	1.3062	170.82 + 1.01	6.98 + 0.15	21.405
-441	7	7-1/2	1/4	6.975 + .040	.275 + .006	1.3528	177.17 + 1.01	6.98 + 0.15	22.168
-442	7-1/4	7-3/4	1/4	7.225 + .045	.275 + .006	1.3995	183.52 + 1.14	6.98 + 0.15	22.934
-443	7-1/2	8	1/4	7.475 + .045	.275 + .006	1.4461	189.87 + 1.14	6.98 + 0.15	23.697
-444	7-3/4	8-1/4	1/4	7.725 + .045	.275 + .006	1.4928	196.22 + 1.14	6.98 + 0.15	24.463
-445	8	8-1/2	1/4	7.975 + .045	.275 + .006	1.5394	202.57 + 1.14	6.98 + 0.15	25.226
-446	8-1/2	9	1/4	8.475 + .055	.275 + .006	1.6327	215.27 + 1.40	6.98 + 0.15	26.755
-447	9	9-1/2	1/4	8.975 + .055	.275 + .006	1.7260	227.97 + 1.40	6.98 + 0.15	28.284
-448	9-1/2	10	1/4	9.475 + .055	.275 + .006	1.8193	240.67 + 1.40	6.98 + 0.15	29.813
-449	10	10-1/2	1/4	9.975 + .055	.275 + .006	1.9126	253.37 + 1.40	6.98 + 0.15	31.342
-450	10-1/2	11	1/4	10.475 + .060	.275 + .006	2.0059	266.07 + 1.52	6.98 + 0.15	32.871
-451	11	11-1/2	1/4	10.975 + .060	.275 + .006	2.0992	278.77 + 1.52	6.98 + 0.15	34.400
-452	11-1/2	12	1/4	11.475 + .060	.275 + .006	2.1925	291.47 + 1.52	6.98 + 0.15	35.929
-453	12	12-1/2	1/4	11.975 + .060	.275 + .006	2.2858	304.17 + 1.52	6.98 + 0.15	37.458
-454	12-1/2	13	1/4	12.475 + .060	.275 + .006	2.3791	316.87 + 1.52	6.98 + 0.15	38.987
-455	13	13-1/2	1/4	12.975 + .060	.275 + .006	2.4724	329.57 + 1.52	6.98 + 0.15	40.515
-456	13-1/2	14	1/4	13.475 + .070	.275 + .006	2.5657	342.27 + 1.78	6.98 + 0.15	42.044
-457	14	14-1/2	1/4	13.975 + .070	.275 + .006	2.6590	354.97 + 1.78	6.98 + 0.15	43.573
-458	14-1/2	15	1/4	14.475 + .070	.275 + .006	2.7523	367.67 + 1.78	6.98 + 0.15	45.102
-459	15	15-1/2	1/4	14.975 + .070	.275 + .006	2.8456	380.37 + 1.78	6.98 + 0.15	46.631
-460	15-1/2	16	1/4	15.475 + .070	.275 + .006	2.9389	393.07 + 1.78	6.98 + 0.15	48.160
-461	16	16-1/2	1/4	15.955 + .075	.275 + .006	3.0285	405.26 + 1.90	6.98 + 0.15	49.628
-462	16-1/2	17	1/4	16.455 + .075	.275 + .006	3.1218	417.96 + 1.90	6.98 + 0.15	51.157
-463	17	17-1/2	1/4	16.955 + .080	.275 + .006	3.2151	430.66 + 2.05	6.98 + 0.15	52.686
-464	17-1/2	18	1/4	17.455 + .085	.275 + .006	3.3084	443.36 + 2.15	6.98 + 0.15	54.215
-465	18	18-1/2	1/4	17.955 + .085	.275 + .006	3.4017	456.06 + 2.15	6.98 + 0.15	55.744
-466	18-1/2	19	1/4	18.455 + .085	.275 + .006	3.4950	468.76 + 2.15	6.98 + 0.15	57.273
-467	19	19-1/2	1/4	18.955 + .090	.275 + .006	3.5883	481.46 + 2.25	6.98 + 0.15	58.802
-468	19-1/2	20	1/4	19.455 + .090	.275 + .006	3.6816	494.16 + 2.25	6.98 + 0.15	60.331
-469	20	20-1/2	1/4	19.955 + .090	.275 + .006	3.7749	506.86 + 2.45	6.98 + 0.15	61.860
-470	21	21-1/2	1/4	20.955 + .090	.275 + .006	3.9615	532.26 + 2.45	6.98 + 0.15	64.917
-471	22	22-1/2	1/4	21.955 + .100	.275 + .006	4.1481	557.66 + 2.55	6.98 + 0.15	67.975
-472	23	23-1/2	1/4	22.940 + .105	.275 + .006	4.3319	582.65 + 2.65	6.98 + 0.15	70.987
-473	24	24-1/2	1/4	23.940 + .110	.275 + .006	4.5184	608.10 + 2.80	6.98 + 0.15	74.043
-474	25	25-1/2	1/4	24.940 + .115	.275 + .006	4.7050	633.50 + 2.90	6.98 + 0.15	77.101
-475	26	26-1/2	1/4	25.940 + .120	.275 + .006	4.8916	658.85 + 3.05	6.98 + 0.15	80.159