Value Collection 31302 Uss Flat Washer 5/16 Inch Steel Zinc

Product Description

The VALUE COLLECTION 31302 is a USS flat washer designed for use with 5/16 inch fasteners. It is made from steel with a zinc-plated finish that provides basic corrosion resistance in standard service environments. The washer measures 3/8 inches inner diameter, 7/8 inches outer diameter, and 3/32 inches thick, following USS (United States Standard) dimensions that provide a wider bearing surface than SAE equivalents. Licensed tradespeople, maintenance technicians, and contractors use these washers to distribute clamp load, protect surface finishes, and prevent fastener pull-through in a wide range of structural and mechanical assemblies.

This washer is suited for general-purpose bolted connections in residential construction, commercial maintenance, light structural work, and mechanical equipment installation. The USS profile gives it a larger outer diameter relative to the screw size, making it a practical choice when the mating surface requires extra load distribution. It is sold individually with a minimum order quantity of 250 pieces, making it appropriate for stocking in trade supply bins, job-site fastener kits, or shop inventory.

Key Features

• USS flat washer profile provides wider bearing surface than SAE equivalents for the same screw size
• Steel construction with zinc-plated finish for basic corrosion resistance in dry to mildly humid conditions
• 3/8 inch inner diameter sized for 5/16 inch fasteners with standard clearance
• 7/8 inch outer diameter distributes clamp load across a larger contact area
• 3/32 inch thickness provides consistent seating under standard bolt head or nut
• Inch measurement system; conforms to USS dimensional standards

Compatibility

Designed as an OEM-style and general-replacement flat washer for 5/16 inch screw and bolt applications requiring USS-standard dimensions in steel with zinc-plated finish.

Installation Notes

Install between the fastener head or nut and the mating surface with the flat face seated flush against the work piece. No special tools are required beyond those used to drive the fastener. Verify that the zinc-plated finish is appropriate for the service environment, as this coating is not rated for prolonged outdoor immersion or highly corrosive conditions. Follow applicable mechanical or structural codes for fastener assembly torque and joint requirements.