3a thread class right-hand 0.325" thread length hexagon head style 0.046" hole diameter 0.428" grip length 32 thread quantity per inch unjf thread series
3a thread class right-hand 0.644" thread length double hexagon w/hole head style 1.240" hole diameter B1.865 nema lifting type k grip length 24 thread quantity per inch cadmium surface treated unf thread series