The Hillman Group 43207 5/8-11 Locking Flange Nut, 5-Pack

Product Description Hillman Grade 8 Flange Nuts combine a hex nut and a washer into a single high-strength fastener. Fitting a 5/8-11 coarse bolt, the nut carries a wide, washer-like flange at its base that spreads clamping force over a broad area, so no separate washer is needed and the joint seats securely, which makes it a favorite for automotive and heavy machinery work. The six-sided body takes a standard wrench or socket for high torque, while the integral flange beneath seats flat against the surface. The flange spreads load and helps the nut resist loosening under vibration and repeated stress, giving a stable, well-clamped joint that stands up to the movement and load of running equipment. Made from grade 8 hardened alloy steel with a plain finish, this flange nut delivers high tensile strength for demanding, high-load joints. Grade 8 is a high-strength rating, so it pairs with grade 8 bolts on connections that carry real stress and cannot be allowed to loosen or fail in service. Use these nuts for automotive, engine, suspension, and heavy machinery assemblies where high strength and a built-in bearing surface are wanted. They pair with a matching grade 8 bolt for a complete high-strength joint. This 5-piece pack provides a ready supply for automotive, machinery, and heavy repair projects around the shop and garage. From the Manufacturer Flange Nuts have wide flanges at one end that act as integrated, non-spinning washers. This serves to distribute the pressure of the nut over the part being secured, reducing the chance of damage to the part and making it less likely to loosen as a result of an uneven fastening surface. These nuts are mostly hexagonal in shape and are made up of hardened steel and coated with zinc.

• CLAMPS WITH A BUILT-IN FLANGE: This flange nut has a wide, washer-like flange at its base that spreads clamping force over a broad area and bites in to resist loosening, so no separate washer is needed for a tight, secure joint.
• HEX BODY, WIDE FLANGE BASE: Fitting a 5/8-11 coarse bolt, the six-sided body takes a wrench while the integral flange seats flat against the surface, spreading load and helping the nut hold its clamp under vibration and repeated stress.
• GRADE 8 ALLOY STEEL: Made from grade 8 hardened alloy steel with a plain finish, this flange nut delivers the high tensile strength needed for demanding automotive and machinery joints, pairing with grade 8 bolts for high-load connections.
• AUTOMOTIVE AND MACHINERY USE: Ideal for automotive, engine, suspension, and heavy machinery assemblies where high strength and a built-in bearing surface matter, a dependable choice for repair, maintenance, and heavy equipment work.
• TRUSTED HILLMAN QUALITY: Hillman supplies dependable fasteners and hardware that homeowners and pros rely on for everyday projects. Keep these nuts on hand for assembly, mounting, and repair jobs around the home and shop.