Used on patriot missile. 2a thread class right-hand 0.550" thread length flat chamfer head style 32 thread quantity per inch straight knurled anodize head surface treated unc thread series
3a thread class right-hand 0.360" thread length fillister head style 28 thread quantity per inch recessed head passivate fastener surface treated unf thread series
2a thread class right-hand 1.236" thread length hexagon head style 0.094" hole diameter 13 thread quantity per inch cadmium surface treated unc thread series
2a thread class right-hand 0.120" thread length flat countersunk head style 40 thread quantity per inch oxide film threads surface treated unc thread series
3a nut thread thread class right-hand nut thread 0.303" stud thread thread length 0.959" overall length 20 stud thread thread quantity per inch 0.047 in. center drill to 0.100 in. dia max both ends unf nut thread thread series
3a thread class right-hand flush countersunk head style 1.630" grip length 24 thread quantity per inch 156000 single pounds per square inch shear strength cadmium surface treated unjf thread series
flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.075" grip length anodize stem or chromate stem surface treated
flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.057" grip length anodize stem or chromate stem surface treated
3b thread class right-hand flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.438" grip length 28 thread quantity per inch 125000 single pounds per square inch shear strength furnished without bolt cadmium expander surface treated unjf thread series
3a thread class right-hand 0.594" thread length double hexagon w/hole head style 0.427" grip length 24 thread quantity per inch navy special project unjf thread series