2b single mounting facility thread class 1.250" overall length 1.594" overall width 40 single mounting facility thread quantity per inch unc single mounting facility thread series
2a single mounting facility thread class 0.406" single mounting facility thread length 1.468" overall length circular wafer, bushing mount unef single mounting facility thread series
2a single mounting facility thread class 0.406" single mounting facility thread length 1.718" overall length circular wafer, bushing mount unef single mounting facility thread series