2a thread class right-hand 1.411" overall length 1.625" overall width 18 thread quantity per inch item must comply with requirements of desc production standard L03430; for navy nuclear propulsion plant products only unef thread series
Used on 2350-01-087-1097 cmbt85-m1e1,armored battle tank. 2a thread class right-hand 2.500" overall width 16 thread quantity per inch uns thread series
2b thread class right-hand 0.843" overall length 1.328" overall width 18 thread quantity per inch heavier nickel plating required for emi/rfi protection unef thread series