1/4-20 GR2 HEX NUT HDG .016” SAE J995 GRADE 2 HEX NUT HDG ASME/ANSI B18.2.2 1987 IFI-7 AF 0.428-0.438” TH 0.212-0.226” – 100/BOX Tapped Over Size per ASTM A 153 class C