2b thread class right-hand 3.990" overall length 1.990" overall width 40 thread quantity per inch two round openings for connector rectangular shape unc thread series
2a single mounting facility thread class 0.312" single mounting facility thread length 1.149" overall length 1.094" 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 1.125" 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 1.597" overall length 1.125" overall width circular wafer, bushing mount unef single mounting facility thread series
2a single mounting facility thread class 0.437" single mounting facility thread length 1.899" overall length snap or line unef single mounting facility thread series