![Heavy Hex Nuts, Grade A, National Coarse (Bulk Carton)](http://www.sterlinghardware.com/cdn/shop/products/00206_450_898976a8-ffd2-4324-9c5b-3cd1c8f3af01_{width}x.jpg?v=1575439622)
Heavy Hex Nuts, Grade A, National Coarse (Bulk Carton)
A six-sided internally threaded fastener which is both thicker and wider across the flats than a same-sized finished hex nut. Nuts in sizes 7/16 and smaller will be double chamfered. Larger sizes are either double chamfered or chamfered on top with a washer faced bearing surface. This is the strongest of all comparably-graded nuts because of its greater length of thread engagement and greater resistance to dilation. *PL - PLin *ZB - Zinc Blue *HDG - Hot Dip Galvanized