Midwest Fastener 5/16 in.-18 Grade 8 Hex Flange Locknut

The Midwest Fastener Grade 8 Hex Flange Locknut is engineered for heavy-duty automotive, agricultural, and industrial applications requiring superior tensile strength and vibration resistance. Constructed from high-grade steel and protected by a yellow zinc finish, this fastener provides exceptional durability and dependable corrosion protection in demanding environments. Featuring an integrated wide flange base, this locknut distributes clamping force evenly across mating surfaces, eliminating the need for a separate washer while preventing surface distortion. The precision coarse thread ensures smooth installation, strong grip, and steadfast locking reliability across critical structural joints.