2a thread class right-hand 0.310" thread length flat countersunk undercut head style 24 thread quantity per inch passivate fastener surface treated unc thread series
2a thread class right-hand 0.202" thread length knurled no. 4 head style 32 thread quantity per inch straight knurl passivate surface treated unc thread series
Used on aavp78a1. 3a thread class right-hand 2.745" thread length hexagon head style 14 thread quantity per inch has hole drilled opposite head parallel to threads with 0.375-16 unc-3b threads passivate surface treated unf thread series
3a thread class right-hand 0.282" thread length flat chamfer head style 32 thread quantity per inch navy special project passivate surface treated unf thread series