2a thread class right-hand 1.375" thread length flat chamfer head style 12 thread quantity per inch phosphate screw surface treated no. 63 finish on all surfaces unf thread series
Used on tractor, flightline towing. 2a thread class right-hand 1.000" thread length flat chamfer head style 3.750" grip length 24 thread quantity per inch unf thread series
3a thread class right-hand 0.564" thread length double hexagon head style 2.052" grip length 18 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.282" thread length pan head style 32 thread quantity per inch navy special project passivate surface treated unjc thread series
3a thread class right-hand 1.375" thread length round w/wrench flats head style 0.037" hole diameter 20 thread quantity per inch navy special project hole drilled thru head along longitudinal axis to a depth of 1.700 in. hole threaded internally 0.250-28 unjf 3b passivate surface treated unjf thread series
3a thread class right-hand 0.375" thread length flat chamfer head style 18 thread quantity per inch navy special project chromium surface treated unc thread series
