2a thread class 1.750" thread length flat countersunk head style 0.554" grip length 12 thread quantity per inch with between the flats .312 to .316 unc thread series
fine thread class right-hand 1.005" thread length double hexagon w/ hole head style 18 thread quantity per inch passivate screw surface treated dry film lubricant, drilled head unjf thread series
2a thread class 7.750" thread length flat countersunk head style 0.617" grip length 11 thread quantity per inch with between the flats .375 to .379 unc thread series
2a thread class 1.500" thread length flat countersunk head style 0.493" grip length 13 thread quantity per inch with between the flats .312 to .316 unc thread series
2a thread class right-hand 3.000" thread length hexagon head style 13 thread quantity per inch item is part of a 1-inch pressure regulating valve unc thread series