3a thread class right-hand 0.218" thread length fillister head style 0.031" hole diameter 56 thread quantity per inch nickel screw surface treated unf thread series
3a thread class right-hand 0.344" thread length fillister head style 0.040" hole diameter 36 thread quantity per inch head of screw black enamel finish unf thread series
2a nut thread a thread class right-hand nut thread a 1.375" nut thread a thread length 23.000" overall length 24 nut thread a thread quantity per inch chamfer one end 40 degrees min 50 degrees max cadmium surface treated unf nut thread a thread series
3a thread class right-hand 0.374" thread length hexagon head style 0.859" grip length 32 thread quantity per inch cadmium surface treated unf thread series