2b thread class right-hand any acceptable overall length any acceptable overall width 18 thread quantity per inch nickel surface treated straight type w/cable clamp unef thread series
2a single mounting facility thread class 0.375" single mounting facility thread length 2.501" overall length circular wafer, bushing mount unef single mounting facility thread series
2a thread class right-hand 2.312" overall length 0.750" overall width 32 thread quantity per inch item must comply with requirements of desc production standard no. L02106; for navy nuclear propulsion plant products only unc thread series