Used on M981. 2a thread class right-hand 0.280" thread length hexagon head style 28 thread quantity per inch passivate surface treated unf thread series
Used on M981. 2a thread class right-hand 0.188" thread length round head style 32 thread quantity per inch oxide film surface treated unc thread series
3a thread class right-hand 0.350" thread length flat chamfer head style 32 thread quantity per inch has hexagon socket internal drive style located in head unc thread series
2a thread class right-hand 0.115" thread length pan head style 40 thread quantity per inch navy special project color black oxide surface treated unc thread series
2a thread class right-hand 0.250" thread length flat countersunk head style 48 thread quantity per inch navy special project oxide surface treated unf thread series
2a thread class right-hand 0.375" thread length knurled no. 4 head style 20 thread quantity per inch straight knurl passivate surface treated unc thread series
2a thread class right-hand 0.250" thread length pan head style 32 thread quantity per inch item altered from MS51957-33 passivate surface treated unc thread series
2a thread class right-hand 0.200" thread length pan head style 40 thread quantity per inch navy special project passivate surface treated unc thread series
2a thread class right-hand 0.440" thread length pan head style 32 thread quantity per inch spherical radius of 82 degrees on thread end unf thread series
2a thread class right-hand 0.106" thread length flat chamfer head style 40 thread quantity per inch straight knurl oxide surface treated unf thread series
2a thread class right-hand 0.380" thread length knurled no. 4 head style 20 thread quantity per inch medium straight knurl cadmium surface treated unc thread series
2a thread class right-hand 0.345" thread length pan head style 32 thread quantity per inch furnished with o-ring, bearing surface of head grooved for o-ring passivate surface treated unc thread series