Used on B-1. 2a thread class right-hand 1.006" overall length 1.703" overall width 18 thread quantity per inch contacts per M39029/58-364 and/ -365 unef thread series
Used on B-1. 2a thread class right-hand 1.349" overall length 1.219" overall width 20 thread quantity per inch contacts per M39029/56-348 unef thread series