2b thread class right-hand 28 thread quantity per inch applicable to classes a, b, and c cadmium surface treated double clamping action w or w/o bushing un thread series
2a single mounting facility thread class 0.437" single mounting facility thread length 1.899" overall length tap, circular, bushing mount unef single mounting facility thread series
32 thread quantity per inch item must comply with requirements of desc production standard no. L01746, for navy @nuclear propulsion plant products only uns thread series
1.160" overall length item must comply with requirements of desc production standard no. L01720, for navy nuclear propulsion plant products only disc w/flange