Bulk Heavy Hex Nuts – A563 Grade DH, Plain Finish, Coarse Thread, Made in USA – Monster B 440104 The head gives you installation

The head gives you installation freedom: a stout 5/16″ across-flats hex for high-torque driving

High Strength: Alloy steel construction provides exceptional tensile strength and consistent torque performance

Nylon Insert Locking Mechanism: Prevents loosening under vibration

Removal typically requires drilling out the anchor

High-Torque Drive: Unslotted 5/16″ A/F hex installs fast and resists cam-out

Bulk Heavy Hex Nuts – A563 Grade DH, Plain Finish, Coarse Thread, Made in USA – Monster B 440104 The head gives you installationMonster Overview Fix your project right the first time with A563 Grade DH Heavy Hex Nuts from Monster Bolts. These high strength structural nuts are Made in the USA and built for demanding applications in construction, structural steel, bridges, heavy equipment, and industrial assemblies. The heavy hex profile provides a larger bearing surface and greater wrenching flats compared to standard finished hex nuts, making them ideal anywhere high clamp