O-Rings For Straight Thread Tube Fitting Bosses

Tube Size				Dimensions in Inches				Dimensions in Millimeters
AS568A	Dash #	O.D	Vol. (in³)	I.D.	±	C/S	±	I.D.	±	C/S	±
901		3/32	.0019	.185	.005	.056	.003	4.70	0.13	1.42	0.08
902	2	1/8	.0031	.239	.005	.064	.003	6.07	0.13	1.63	0.08
903	3	3/16	.0037	.301	.005	.064	.003	7.65	0.13	1.63	0.08
904	4	1/4	.0054	.351	.005	.072	.003	8.90	0.13	1.83	0.08
905	5	5/16	.0062	.414	.005	.072	.003	10.51	0.13	1.83	0.08
906	6	3/8	.0082	.468	.005	.078	.003	11.90	0.13	1.98	0.08
907		7/16	.0102	.530	.007	.082	.003	13.46	0.18	2.08	0.08
908	8	1/2	.0137	.644	.009	.087	.003	16.36	0.23	2.20	0.08
909		9/16	.0186	.706	.009	.097	.003	17.93	0.23	2.46	0.08
910	10	5/8	.0198	.755	.009	.097	.003	19.18	0.23	2.46	0.08
911		11/16	.0326	.863	.009	.116	.004	21.92	0.23	2.95	0.10
912	12	3/4	.0345	.924	.009	.116	.004	23.47	0.23	2.95	0.10
913		13/16	.0366	.986	.010	.116	.004	25.04	0.25	2.95	0.10
914		7/8	.0386	1.047	.010	.116	.004	26.62	0.25	2.95	0.10
916	16	1	.0427	1.171	.010	.116	.004	29.74	0.25	2.95	0.10
918		1-1/8	.0489	1.355	.012	.116	.004	34.42	0.30	2.95	0.10
920	20	1-1/4	.0547	1.475	.014	.118	.004	37.46	0.36	3.00	0.10
924	24	1-1/2	.0631	1.720	.014	.118	.004	43.70	0.36	3.00	0.10
928	28	1-3/4	.0759	2.090	.018	.118	.004	53.10	0.46	3.00	0.10
932	32	2	.0843	2.337	.018	.118	.004	59.36	0.46	3.00	0.10

The 900 series boss seals are designed to seal straight thread tube fittings when they are fastened into a boss. In this type of fitting the O-Ring is not located in a conventional rectangular groove. Rather, the seal is obtained when the gland components exert a diagonal squeeze through the O-Ring cross section.