2a thread class right-hand 0.938" thread length knurled no. 4 head style 20 thread quantity per inch passivate fastener surface treated unc thread series
3a thread class right-hand 0.314" thread length pan no. 2 head style 32 thread quantity per inch dri-film lubricated fasteners per mil-l-8937 unjf thread series
2a thread class right-hand 0.359" thread length flat chamfer head style 28 thread quantity per inch straight knurl passivate surface treated unf thread series
3a thread class right-hand flush countersunk head style 0.990" grip length 28 thread quantity per inch 108000 single pounds per square inch shear strength cadmium surface treated unjf thread series
flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 90000 single pounds per square inch shear strength passivate surface treated