2a thread class right-hand 0.110" thread length flat countersunk head style 40 thread quantity per inch passivate screw surface treated undercut on unthreaded portion of screw 0.078 nin to 0.081 inch max dia. unc thread series
2a thread class right-hand 0.500" thread length 20 thread quantity per inch unthreaded portion of bolt is undercut to 0.193 min & 0.198 max unc thread series
2a thread class right-hand 0.997" thread length pan no. 2 head style 32 thread quantity per inch passivate screw surface treated self-locking, o-ring silicone rubber to be provided unc thread series
3a thread class right-hand 0.777" thread length spline drive shear head head style 2.240" grip length 18 thread quantity per inch passivate surface treated unjf thread series
3a thread class right-hand 0.338" thread length flat countersunk head style 0.678" grip length 32 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.338" thread length flat countersunk head style 0.740" grip length 32 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.813" thread length bevel-conical head style 20 thread quantity per inch six .070 in holes in head. cadmium surface treated unjf thread series