Value Collection MSC-09181991 Fender Flat Washer 5/16 in

Product Description

The VALUE COLLECTION MSC-09181991 is a fender flat washer designed for use with 5/16 inch screws. It is manufactured from Grade 316 stainless steel with a plain finish, making it well suited for applications where corrosion resistance is a priority. The washer features an inside diameter of 0.336 inches, an outside diameter of 1.5 inches, and a thickness of 0.065 inches. The larger outside diameter relative to the screw size distributes clamping load across a wider surface area, reducing the risk of fastener pull-through in softer or thinner base materials. Plumbers, HVAC techs, electricians, and general trade professionals reach for fender washers when standard flat washers do not provide enough bearing surface.

This washer is appropriate for residential and light commercial trade applications where a 5/16 inch fastener is used and a broad bearing surface is needed. Common scenarios include pipe hanger assemblies, equipment mounting, sheet metal work, and structural connections exposed to moisture or corrosive environments. Grade 316 stainless steel offers improved chloride resistance compared to Grade 304, making it a practical choice for coastal installations, mechanical rooms, pool equipment areas, and anywhere with prolonged moisture exposure.

Key Features

• Grade 316 stainless steel construction for strong corrosion resistance in wet or coastal environments
• Fender washer profile provides a 1.5 inch outside diameter for wide load distribution with a 5/16 inch screw
• Inside diameter of 0.336 inches fits standard 5/16 inch fasteners with a close tolerance
• Plain finish with no coating or plating that could introduce galvanic compatibility concerns
• Inch measurement system for straightforward integration with standard trade hardware

Compatibility

Designed for use with 5/16 inch screws and bolts in inch-measurement fastener assemblies. Suitable as a general-purpose fender washer replacement or new installation component where a 0.336 inch ID and 1.5 inch OD washer is required.

Installation Notes

Install with the washer seated flat against the base material surface before tightening the fastener. Power down or de-energize any associated equipment before working in electrical or mechanical enclosures. When mixing metals, verify that Grade 316 stainless steel is galvanically compatible with adjacent hardware to prevent accelerated corrosion. General trade installation practices and applicable local codes should be followed.