5/16-18X2 1/2 GR2 HEX CAP SCR PLN SAE J429 GRADE 2 HEX CAP SCREWS PLAIN ASME B18.2.1 1996 IFI-7 AF 0.489-.0500” HH 0.195-0.211” AC 0.557-0.577” – 100/BOX