2a thread class right-hand 0.750" thread length pan no. 2 head style 18 thread quantity per inch self-locking passivate surface treated unrc thread series
2a thread class right-hand 0.667" thread length flat countersunk undercut head style 24 thread quantity per inch oxide screw surface treated unc thread series
3a thread class right-hand flush countersunk head style 0.370" grip length 32 thread quantity per inch 95000 single pounds per square inch shear strength aluminum surface treated unjf thread series