2a single mounting facility thread class 0.250" single mounting facility thread length 1.782" overall length 1.312" overall width circular wafer, bushing mount unef single mounting facility thread series
2a single threaded stud thread class 0.500" single threaded stud thread length 5.407" overall length 1.531" overall width 32 single threaded stud thread quantity per inch rectangular unc single threaded stud thread series