MIDWEST FASTENER CORP 932126 Flange Nut 5/8"-18 Grade 8 Zinc Yellow 6 PK hardware

Flange Nut 5/8"-18 Grade 8

This pack contains six flange nuts sized 5/8"-18, manufactured from Grade 8 steel with a zinc yellow finish. They suit automotive, industrial and heavy-equipment fastening where high tensile strength is required. The integrated flange removes the need for a separate flat washer, simplifying assembly on the job site. Mechanics and fabricators who need reliable Grade 8 hardware will find this quantity convenient for recurring maintenance or production runs.

Integrated Flange Distributes Clamping Load

The wide flange acts as a built-in, non-spinning washer that spreads clamping force across a larger surface area. This reduces the risk of damaging the secured part and helps resist loosening on uneven or painted surfaces. Zinc yellow plating provides a baseline layer of corrosion protection for indoor or sheltered outdoor use. Installers can tighten directly against the flange without hunting for loose washers.

Grade 8 Strength Rating Decides Suitability

Grade 8 designation confirms the nut meets the higher proof-load and hardness requirements for critical structural joints. Buyers who need a lower-grade fastener for light-duty brackets or non-structural panels should select a different specification. The 5/8"-18 thread pitch must match the mating bolt exactly; no adapter or conversion is included. Verify the thread series and grade against your engineering drawing before ordering.