Value Collection FWI5031M-100BX Flat Washer 5/16 in Steel

Product Description

The VALUE COLLECTION FWI5031M-100BX is a standard flat washer designed for use with 5/16 inch fasteners. Manufactured from steel with a galvanized finish, this washer provides corrosion resistance in a wide range of trade and industrial applications. It carries an inside diameter of 0.339 inches, an outside diameter of 0.6875 inches, and a thickness of 0.08 inches. The washer conforms to ASTM F436, making it suitable for structural and mechanical fastening work. Electricians, plumbers, HVAC technicians, and general contractors commonly use standard flat washers to distribute load, protect surfaces, and provide a stable bearing surface under bolt heads and nuts.

This flat washer fits 5/16 inch screw applications across residential and commercial installations. Typical uses include equipment mounting, pipe support hangers, electrical panel and conduit bracket fastening, and general mechanical assemblies. The galvanized finish makes it appropriate for moderately corrosive environments such as outdoor mechanical rooms, rooftop equipment installations, and wet utility spaces. Material grade 1035/1050 steel provides adequate strength for standard fastening loads encountered in trade work.

Key Features

• Fits 5/16 inch screw size with 0.339 inch inside diameter
• Steel construction, material grade 1035/1050 for reliable mechanical strength
• Galvanized finish for corrosion resistance in moderate-exposure environments
• Conforms to ASTM F436 fastener standard
• Outside diameter of 0.6875 inches for broad load distribution
• Thickness of 0.08 inches for consistent bearing surface

Compatibility

Designed as a standard replacement flat washer for use with 5/16 inch fasteners in general mechanical, electrical, plumbing, and HVAC applications where an inch-measurement, ASTM F436 standard washer is required.

Installation Notes

Standard flat washers are installed by hand prior to driving the fastener with the appropriate wrench or socket. Always ensure the washer seats flat against the mating surface with no tilt or binding. When used in structural or load-bearing connections, verify that the fastener assembly as a whole meets applicable code requirements for the application. Replace any washer that shows signs of cracking, deformation, or coating failure.