3a thread class right-hand 0.750" thread length flat chamfer head style 2.125" grip length 24 thread quantity per inch 0.047 in. radius around top of head, 0.031 in. max radius under head against body unf thread series
right-hand nut thread 0.344" stud thread thread length 1.375" overall length 16 stud thread thread quantity per inch 0.047 in. 45.0 degree chamfer at stud end zinc or cadmium surface treated uns stud thread thread series
2a thread class right-hand 0.500" thread length hexagon head style 0.188" grip length 16 thread quantity per inch 0.094 in. radius groove, 0.375 in. dia, 0.562 in. from face of head unc thread series
2a thread class right-hand 0.355" thread length flat countersunk head style 32 thread quantity per inch navy special project passivate screw surface treated unc thread series
