2b thread class right-hand 4.437" overall length 1.530" overall width 18 thread quantity per inch cadmium surface treated angle type unef thread series
2a single mounting facility thread class 0.375" single mounting facility thread length 2.125" overall length 1.422" overall width circular wafer, bushing mount unef single mounting facility thread series
2a single mounting facility thread class 0.250" single mounting facility thread length 2.375" overall length 1.422" overall width circular wafer, bushing mount unef single mounting facility thread series