O-RINGS FOR TUBE FITTING BOSSES

Tube Size   Dimensions in Inches Dimensions in Millimeters  
AS568A Dash O.D Vol. in I.D. ± C/S ± I.D. ± C/S ±
No. Cu. In.
901   Mar-32 0.0019 0.185 0.005 0.056 0.003 4.7 0.13 1.42 0.08
902 2 8-Jan 0.0031 0.239 0.005 0.064 0.003 6.07 0.13 1.63 0.08
903 3 16-Mar 0.0037 0.301 0.005 0.064 0.003 7.65 0.13 1.63 0.08
904 4 4-Jan 0.0054 0.351 0.005 0.072 0.003 8.9 0.13 1.83 0.08
905 5 16-May 0.0062 0.414 0.005 0.072 0.003 10.51 0.13 1.83 0.08
906 6 8-Mar 0.0082 0.468 0.005 0.078 0.003 11.9 0.13 1.98 0.08
907   16-Jul 0.0102 0.53 0.007 0.082 0.003 13.46 0.18 2.08 0.08
908 8 2-Jan 0.0137 0.644 0.009 0.087 0.003 16.36 0.23 2.2 0.08
909   16-Sep 0.0186 0.706 0.009 0.097 0.003 17.93 0.23 2.46 0.08
910 10 8-May 0.0198 0.755 0.009 0.097 0.003 19.18 0.23 2.46 0.08
911   16-Nov 0.0326 0.863 0.009 0.116 0.004 21.92 0.23 2.95 0.1
912 12 4-Mar 0.0345 0.924 0.009 0.116 0.004 23.47 0.23 2.95 0.1
913   13/16 0.0366 0.986 0.01 0.116 0.004 25.04 0.25 2.95 0.1
914   8-Jul 0.0386 1.047 0.01 0.116 0.004 26.62 0.25 2.95 0.1
916 16 1 0.0427 1.171 0.01 0.116 0.004 29.74 0.25 2.95 0.1
918   1/1/2008 0.0489 1.355 0.012 0.116 0.004 34.42 0.3 2.95 0.1
920 20 1/1/2004 0.0547 1.475 0.014 0.118 0.004 37.46 0.36 3 0.1
924 24 1/1/2002 0.0631 1.72 0.014 0.118 0.004 43.7 0.36 3 0.1
928 28 1/3/2004 0.0759 2.09 0.018 0.118 0.004 53.1 0.46 3 0.1
932 32 2 0.0843 2.337 0.018 0.118 0.004 59.36 0.46 3 0.1

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.