TUBE OD UN / UNF S L D L1 D1 PART NO. PART NO. mm Inch N mm mm mm mm mm NUT SLEEVE 6 1/4 7/16 -20 14 15.5 7.8 10.4 9.7 4F-N 4F-S 8 5/16 1/2 -20 17 17 9.5 11.2 11.3 5F-N 5F-S 10 3/8 9/16 -18 19 18.3 11.2 12.7 12.7 6F-N 6F-S 12 1/2 3/4 -16 22 21.3 14.5 14.2 17.3 8F-N 8F-S 14/15/16 5/8 7/8 -14 27 24.6 17.8 16.8 20.2 10F-N 10F-S 18/20 3/4 1 1/16 -12 32 25.9 21.2 17.3 24.7 12F-N 12F-S 25 1 1 5/16 -12 41 28.4 27.7 19.8 31 16F-N 16F-S 28/30/32 1 1/4 1 5/8 -12 50 31 34.2 23.1 38.9 20F-N 20F-S 35/38 1 1/2 1 7/8 -12 60 35.8 41 28.4 45.3 24F-N 24F-S