flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.080" grip length ns" letters after the material code "b" indicate no preference to lock type (may be visible or internal) . rivets with no letter code (indicating visible lock type) chromate sleeve surface treated
3a thread class right-hand 2.251" thread length hexagon head style 0.060" hole diameter 28 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand flush countersunk head style 1.255" grip length 32 thread quantity per inch 95000 single pounds per square inch shear strength aluminum surface treated unjf thread series
3a thread class right-hand flush countersunk head style 1.130" grip length 32 thread quantity per inch 95000 single pounds per square inch shear strength aluminum surface treated unjf thread series
flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.187" grip length 112000 single pounds per square inch shear strength cadmium surface treated
Used on aircraft,eagle f-15;f-16 aircraft. 2a thread class right-hand 0.175" thread length flat countersunk head style 40 thread quantity per inch cadmium fastener surface treated unc thread series
2a thread class right-hand 1.250" thread length hexagon head style 13 thread quantity per inch weld bar rnd hr STEEL0.375 dia. by 2.750 lengthcenter on top of screw head unc thread series
3a thread class right-hand 0.762" thread length flat chamfer head style 24 thread quantity per inch color black oxide surface treated unc thread series
3a thread class right-hand 0.763" thread length double hexagon w/hole head style 4.740" grip length 20 thread quantity per inch navy special project cadmium surface treated unjf thread series
