2a thread class right-hand 0.579" thread length hexagon extended washer head style 18 thread quantity per inch phosphate surface treated unc thread series
3a thread class right-hand 0.400" thread length hexagon head style 0.615" grip length 28 thread quantity per inch aluminum surface treated unjf thread series
2a thread class right-hand 1.000" thread length 32 thread quantity per inch nickel screw surface treated screw includes black nylon washer dia. 0.495 in.; thickness 0.140 in. unc thread series
3a thread class right-hand flush countersunk head style 1.515" grip length 28 thread quantity per inch 95000 single pounds per square inch shear strength HL70 hi-lok collar included cadmium surface treated unf thread series