Value Collection R51091190 Flat Washer 1/4 in Copper

Product Description

The VALUE COLLECTION R51091190 is a standard flat washer made from copper with a plain finish, sized for 1/4-inch screws. Flat washers distribute load across a fastened joint, reducing the risk of surface damage and preventing fastener pull-through. This washer measures 0.2500 inches inside diameter, 5/8 inches outside diameter, and 0.0490 inches thick. Copper construction makes it well suited for applications that require corrosion resistance or electrical conductivity. Plumbers, electricians, and HVAC technicians install copper washers wherever dissimilar-metal contact must be avoided or where a corrosion-resistant seal point is needed.

This washer is appropriate for residential and light commercial plumbing, electrical, and mechanical fastening applications. Its 1/4-inch screw size fits standard quarter-inch fastener assemblies commonly encountered during equipment installation, panel work, and pipe fitting. The plain finish keeps the copper surface uncoated, which is preferred when the washer must make direct metal-to-metal electrical or thermal contact. Sold individually, with a minimum order quantity of 25 units.

Key Features

• Copper material provides corrosion resistance and electrical conductivity
• Plain finish leaves the copper surface uncoated for direct contact applications
• 0.2500-inch inside diameter fits standard 1/4-inch screw fasteners
• 5/8-inch outside diameter spreads load over a wider bearing surface
• 0.0490-inch thickness meets standard flat washer geometry for 1/4-inch hardware
• Inch measurement system for compatibility with standard SAE fastener assemblies

Compatibility

Designed as a standard flat washer for use with 1/4-inch screw fasteners in plumbing, electrical, HVAC, and general mechanical assembly applications requiring copper material.

Installation Notes

Install using hand tools appropriate for the fastener type — a wrench or screwdriver sized to the mating bolt or screw. Power down or shut off the relevant system before servicing any assembly where this washer will be replaced or installed. Do not overtighten the fastener, as copper is a softer metal and can deform under excessive clamping load. Follow applicable codes, including NEC requirements for electrical assemblies and IPC or IFGC guidelines for plumbing and mechanical connections.