2a thread class right-hand 0.359" thread length knurled no. 1 head style 20 thread quantity per inch cone point 82 deg passivate surface treated unc thread series
3a thread class right-hand 0.355" thread length flat chamfer head style 24 thread quantity per inch self-locking nylon strip insert in threaded end cadmium surface treated unc thread series
3a thread class right-hand 0.859" thread length flat chamfer head style 18 thread quantity per inch passivate fastener surface treated unrc thread series