Used on aircraft,b-2 bomber. 18 1st end thread class 18 1st end thread quantity per inch wire 302 stainless steel per AMS5637 unjs 1st end thread series
Used on support equipment, b-2 bomber.. 3a 1st end bulkhead thread class 12 1st end bulkhead thread quantity per inch this standard provides an identifying number for an, as anodize surface treated unj 1st end bulkhead thread series
Used on submarine; seawolf class. fitting, supply leak off line; elbow shaped with 0.312 in id hole, first end; 0.312 in id hole in heel of first end; second end tapered to o.248 in od; part of hydraulic cylinder end connection