3a thread class right-hand 0.812" thread length hexagon head style 0.313" grip length 24 thread quantity per inch passivate surface treated unf thread series
3a thread class right-hand 0.309" thread length knurled no. 1 head style 28 thread quantity per inch bearing surface of head undercut 0.156 in. deep by 0.870 in. dia. cadmium surface treated unf thread series
2a nut thread a thread class right-hand nut thread a 1.000" nut thread a thread length 15.000" overall length 20 nut thread a thread quantity per inch cadmium surface treated unc nut thread a thread series
flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.595" grip length 14600 double pounds per square inch shear strength cadmium body surface treated
