Value Collection FWI5031-100BX Structural Flat Washer 5/16 in

Product Description

The VALUE COLLECTION FWI5031-100BX is a structural flat washer designed for use with 5/16-inch fasteners in load-bearing and structural bolted connections. Made from steel with a plain finish and manufactured to ASTM F436 standards, this washer distributes clamp load across a broader bearing surface, reducing fastener pull-through and surface damage. With an inside diameter of 11/32 inches and an outside diameter of 11/16 inches, it seats cleanly around standard 5/16-inch bolts and screws. Sold in a box quantity of 100, this washer is a stock item for contractors, ironworkers, and maintenance professionals who regularly work with structural fastener assemblies.

Structural flat washers conforming to ASTM F436 are commonly used in steel-to-steel connections, wood-to-steel connections, and general structural framing applications across commercial and residential construction. They are suitable for use under bolt heads and nuts where bearing surface area matters for joint integrity. This washer is appropriate for both new construction and retrofit or repair work where structural-grade hardware is specified or required by code.

Key Features

• Meets ASTM F436 structural washer standard for load-bearing applications
• Material grade 1035/1050 steel for reliable strength in structural connections
• Plain finish suitable for painted, primed, or interior structural applications
• 11/32-inch inside diameter sized for 5/16-inch screw and bolt shafts
• 11/16-inch outside diameter provides adequate bearing surface for structural joints
• Sold in a 100-piece box for job-site and shop stock efficiency

Compatibility

Designed as a structural-grade replacement or stock washer for use with 5/16-inch fasteners in applications requiring ASTM F436 compliance.

Installation Notes

Structural flat washers are installed by ironworkers, carpenters, and general contractors as part of bolted structural assemblies. Always power down or de-energize any adjacent systems before working in confined structural bays. Follow applicable building codes and engineer specifications for proper torque and fastener assembly requirements. Do not substitute structural-grade washers with standard flat washers where ASTM F436 compliance is specified.