3a nut thread a thread class right-hand nut thread a 0.529" nut thread a thread length 13.784" overall length 20 nut thread a thread quantity per inch furnished with drilled hole 0.106 in. dia unjf nut thread a thread series
2a thread class right-hand 0.155" thread length flat chamfer head style 32 thread quantity per inch passivate fastener surface treated unc thread series
2a thread class right-hand 0.578" thread length flat countersunk head style 32 thread quantity per inch anodize stand-off surface treated unc thread series