2a thread class right-hand 0.400" thread length flat countersunk head style 56 thread quantity per inch navy special project passivate screw surface treated unc thread series
2a thread class right-hand 0.137" thread length flat chamfer head style 40 thread quantity per inch passivate screw surface treated undercut beneath head 0.049 in. min, 0.051 in. max lg unc thread series
3a thread class right-hand 0.376" thread length flat countersunk head style 40 thread quantity per inch passivate screw surface treated unjc thread series
3a thread class right-hand 0.438" thread length flat countersunk head style 40 thread quantity per inch passivate screw surface treated unjc thread series
3a thread class right-hand 0.166" thread length flat countersunk head style 32 thread quantity per inch navy special project passivate screw surface treated unjc thread series
3a thread class right-hand 1.296" thread length flat countersunk head style 32 thread quantity per inch navy special project cadmium screw surface treated unjf thread series
3a thread class right-hand 0.886" thread length flat countersunk head style 28 thread quantity per inch cadmium screw surface treated unjf thread series
2a thread class right-hand 0.408" thread length pan no. 2 head style 32 thread quantity per inch semi-gloss paint, cloud gray per fed 595; furnished with nylon washer unf thread series
