PART NO.THREAD AGGAUGE SEALHEX 1HEX 2HL
20.20.331/4 BSPM16 x 2NBR 0-RING0.750.94--2.10
20.20.341/2 BSPM16 x 2NBR 0-RING1.060.94--2.20
20.20.431/4 NPTM16 x 2TAPER0.750.94--2.10
20.21.33/901/4 BSPM16 x 2NBR 0-RING0.750.752.101.60
20.20.34/90*1/2 BSPM16 x 2DKI METAL RING0.75*1.061.903.10

 

*HEX 2 of 20.20.34/90 is non-swivel.    All dimensions are in inches, except as noted.