3a thread class right-hand flush countersunk head style 0.433" grip length 9300 double pounds per square inch shear strength color black on thread end. restricted usage, oversize parts, for repair work only. unjf thread series
3a thread class right-hand 0.870" grip length 13100 double pounds per square inch shear strength 0.047 oversize. for repair work only. cadmium surface treated unjf thread series
3a thread class right-hand flush countersunk head style 0.245" grip length 9300 double pounds per square inch shear strength color black on thread end. oversize parts, for repair work only. unjf thread series
2a thread class right-hand 1.318" thread length hexagon extended washer head style 11 thread quantity per inch phosphate or oil surface treated unc thread series
2a thread class right-hand 0.157" thread length pan head style 32 thread quantity per inch zinc screw surface treated surface treatment per mil-std-171 finish 1.9.2.3 except thickness 0.0003 in. unc thread series