2b single mounting facility thread class 1.325" overall length 1.280" overall width 48 single mounting facility thread quantity per inch unc single mounting facility thread series
2a single mounting facility thread class 0.437" single mounting facility thread length 2.244" overall length tap, circular, bushing mount unef single mounting facility thread series
2a single mounting facility thread class 0.375" single mounting facility thread length 3.965" overall length 32 single mounting facility thread quantity per inch tap, circular, bushing mount uns single mounting facility thread series