3a thread class right-hand flush countersunk head style 0.693" grip length 32 thread quantity per inch 95000 single pounds per square inch shear strength unjf thread series
3a thread class right-hand 0.459" thread length flat countersunk head style 0.990" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
2a thread class right-hand 1.250" thread length hexagon extended washer head style 13 thread quantity per inch finish color black oxide surface treated unc thread series
2a nut thread a thread class right-hand nut thread a 2.250" nut thread a thread length 36.625" overall length 1BA44 thread quantity per inch zinc surface treated unf nut thread a thread series