Rivetking. ABUP-6/P500 Blind Rivet Backup Washer Size 6

Product Description

The RIVETKING. ABUP-6/P500 is a round aluminum blind rivet backup washer designed to distribute load and prevent pull-through on blind rivet installations. Sized at Size 6 with a 3/16-inch rivet diameter, this washer seats behind the blind side of the workpiece to reinforce the joint and protect softer or thinner base materials. The aluminum construction keeps weight low while providing adequate bearing surface for standard structural and sheet-metal fastening applications. Each package contains 500 washers, making this a practical stocking unit for shop use or field service kits.

Blind rivet backup washers are used wherever the base material cannot adequately support rivet pull forces on its own - common scenarios include thin-gauge sheet metal, fiberglass panels, plastic housings, HVAC ductwork fabrication, electrical enclosures, and general sheet assembly. The Size 6 designation corresponds to a 3/16-inch rivet shank, which is among the most widely used rivet sizes in light commercial and residential trade work. Installers place the washer on the blind side before setting the rivet to spread the clamping load across the 1/2-inch outer diameter bearing face.

Key Features

• Aluminum material - lightweight, corrosion-resistant, compatible with aluminum rivets to avoid galvanic issues
• 3/16-inch inside diameter fits Size 6 blind rivets directly
• 1/2-inch outside diameter provides a broad bearing surface to reduce pull-through in thin substrates
• 1/16-inch thickness keeps the washer low-profile within the joint stack-up
• 500-piece packaging supports bulk shop stocking and reduces per-unit cost on volume jobs

Compatibility

Designed for use with Size 6 blind rivets having a 3/16-inch shank diameter. Suitable for aluminum rivet installations in sheet metal, HVAC duct fabrication, electrical enclosures, and similar light-structural assemblies requiring backup support on the blind side.

Installation Notes

Blind rivet backup washers are installed by sheet metal workers, HVAC technicians, electricians, and general fabricators using standard blind rivet tools. Place the washer over the rivet mandrel and against the blind face of the workpiece before inserting the rivet body into the pre-drilled hole and setting with a rivet gun. Ensure the pre-drilled hole diameter matches the 3/16-inch rivet shank - an oversized hole reduces the washer's effectiveness. Do not substitute a washer of a different inside diameter, as misalignment during setting can compromise joint integrity.