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The VALUE COLLECTION FWTUI80311USA-100BX is an extra thick flat washer designed for use with 5/16-inch screws and fasteners. Manufactured from steel with a Grade 8 material rating, it provides high load-bearing capacity and resistance to deformation under torque. The zinc yellow dichromate finish delivers corrosion resistance suitable for general industrial and trade applications. This washer is measured in the inch system and is appropriate for mechanical assemblies, structural connections, and equipment installations where a thicker load-distribution profile is required.
This extra thick flat washer is used across a range of trade applications including HVAC equipment mounting, plumbing fixture installations, electrical enclosure assembly, and general mechanical work. The increased thickness compared to standard flat washers makes it well suited for situations where a larger bearing surface or additional standoff is needed between a fastener and a mating surface. It is sold in a minimum order quantity of 100 units per box.
Designed as an OEM-style replacement and general-use flat washer for 5/16-inch inch-system fastener assemblies across industrial, mechanical, and trade applications.
Installation is performed by any trade professional working with standard inch-system fasteners. Always de-energize or shut off relevant systems before accessing fastener assemblies in electrical or mechanical enclosures. Use appropriate hand tools and follow applicable torque guidelines specified by the equipment manufacturer for the fastener assembly. Inspect the washer seating surface before installation to ensure proper load distribution.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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