2a single mounting facility thread class 0.250" single mounting facility thread length 4.375" overall length 1.375" overall width circular wafer, bushing mount unef single mounting facility thread series
2a single mounting facility thread class 0.375" single mounting facility thread length 3.065" overall length 2.170" overall width circular wafer, bushing mount unef single mounting facility thread series
2a single mounting facility thread class 0.430" single mounting facility thread length 2.110" overall length tap, circular, bushing mount unef single mounting facility thread series
2b second mounting facility thread class 1.813" overall length 1.313" overall width 32 second mounting facility thread quantity per inch unc second mounting facility thread series