Midwest Fasteners Grade 8 Coarse Thread Zinc Plated Steel Flange Nut

Midwest Fasteners Grade 8 Coarse Thread Zinc Plated Steel Flange Nut

The Midwest Fasteners Grade 8 Coarse Thread Zinc Plated Steel Flange Nut is a steel flange nut family built for applications that demand serious clamping strength along with a self-locking footprint. Finished in yellow zinc for a gold-toned, corrosion-resistant surface, this flange nut line features a coarse thread pitch and an integrated flange that spreads load across a wider bearing surface than a standard hex nut. This family is available in coarse-thread sizes spanning 1/4"-20 through 3/8"-16, including 5/16"-18, so shops and jobsites can match the correct flange nut to the bolt or stud on hand without switching to a separate flat washer.

Key Features

• Size Range: Offered in 1/4"-20, 5/16"-18, and 3/8"-16 coarse-thread sizes to match common bolt and stud diameters.
• Thread Type: Coarse thread for fast engagement and strong holding power on matching coarse-thread bolts and studs.
• Material & Finish: Steel construction with a yellow zinc plating that delivers corrosion resistance and a distinctive gold appearance, suitable for indoor and light outdoor exposure.
• Grade 8: Manufactured to Grade 8 strength specifications, giving it a higher load capacity than standard Grade 2 or Grade 5 hardware, a good match for high-stress assemblies.
• Flange Design: The integrated flange acts as a built-in washer, distributing clamping force over a larger surface area and reducing the chance of the nut digging into softer base materials.
• Product Type: Flange Nut, part of Midwest Fasteners' hex nut fastener lineup.
• Color: Gold-toned finish from the yellow zinc plating process, useful for quick visual identification on an assembly or parts board.

Technical Specifications

• Grade: 8
• Product Size: 1/4" - 3/8"

Typical Applications

• Securing bolted connections where a built-in washer surface is needed without adding a separate flat washer.
• Automotive, equipment and machinery assembly where Grade 8 strength is required.
• Fabrication and maintenance work involving coarse-thread bolts and studs under higher load.
• General shop and jobsite assembly where a corrosion-resistant, high-grade nut is called for.
• Replacement hardware for equipment originally assembled with Grade 8 flange nuts across multiple sizes.

Why Midwest Fasteners?

Midwest Fasteners supplies Grade 8 steel hardware with consistent yellow zinc plating for dependable corrosion resistance and a uniform appearance across every size in this flange nut family. The coarse thread flange nut design gives contractors, fabricators and maintenance techs a dependable, high-strength fastening option with a built-in bearing surface, cutting down on the need to stock separate washers for every job. Consistent sizing, material and finish across the 1/4"-20 through 3/8"-16 range make this flange nut family a solid choice for professional and maintenance applications where fastener reliability matters.