2a single mounting facility thread class 0.250" single mounting facility thread length 3.251" overall length 1.250" overall width circular wafer, bushing mount unef single mounting facility thread series
3a single threaded bushing thread class 0.350" single threaded bushing thread length 3.150" overall length 20 single threaded bushing thread quantity per inch cylindrical w/flange unf single threaded bushing thread series