2a thread class right-hand 0.562" thread length oval countersunk head style 18 thread quantity per inch phosphate screw surface treated unc thread series
3a thread class right-hand 1.340" thread length flat chamfer head style 0.044" hole diameter 18 thread quantity per inch cadmium surface treated unc thread series
2a nut thread thread class right-hand nut thread 0.625" stud thread thread length 3.875" overall length 14 stud thread thread quantity per inch 0.015 in. min to 0.017 in. max depth ofrelief 1.812 in. lomg from nut end cadmium surface treated unf nut thread thread series