flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.381 mils grip length 41000 single pounds per square inch shear strength anodize or chromate surface treated
3a thread class right-hand 1.870" thread length 2.570" overall length 18 thread quantity per inch threaded end has internal hole 1.20 in. deep ball unf thread series
3a thread class right-hand 0.210" thread length double hexagon head style 0.240" grip length 32 thread quantity per inch cadmium surface treated unjf thread series
2a thread class right-hand 0.620" thread length headless (setscrew) head style 28 thread quantity per inch thd interrupted by machined flats beginning 0.200 in. from drive end cadmium surface treated unf thread series
3a thread class right-hand 0.679" thread length double hexagon w/hole head style 0.070" hole diameter 28 thread quantity per inch navy special project unjf thread series
3a thread class right-hand 0.274" thread length hexagon head style 28 thread quantity per inch extrusion on top of head 0.516 in. lg by 0.190 in. min 0.195 in. max dia unf thread series
