2b thread class right-hand 1.316" overall length 1.720" overall width 28 thread quantity per inch chromium surface treated straight type w/cable clamp un thread series
2a single mounting facility thread class 0.375" single mounting facility thread length 2.260" overall length 1.010" overall width circular wafer, bushing mount unef single mounting facility thread series
3.281" overall length 24 single mounting facility thread quantity per inch item must comply with rqmt of the desc production std no. L01721 tap, circuit selector unc single mounting facility thread series