Rivetking SBUP-5/P500 Blind Rivet Backup Washer 500 Pack

Product Description

The RIVETKING SBUP-5/P500 is a round blind rivet backup washer designed to distribute clamping load and protect the base material surface during blind rivet installation. Built from steel with a zinc-plated finish for corrosion resistance, this Size 5 washer is sized for 5/32-inch rivet diameter applications. It measures 7/16 inches in outside diameter, 5/32 inches in inside diameter, and 1/16 inch thick. Packaged in a quantity of 500, this part is well suited for contractors, maintenance crews, and fabricators who install blind rivets in volume on metal assemblies, enclosures, ductwork, and structural components.

These backup washers are used wherever a standard rivet flange alone may pull through or damage a soft, thin, or oversized hole in the substrate material. Common applications include sheet metal work, HVAC panel assembly, electrical enclosure fabrication, and general mechanical assembly. The zinc-plated steel construction makes them appropriate for light indoor and protected outdoor environments where moderate corrosion resistance is needed. The 500-count package supports production-level or multi-job use without frequent reordering.

Key Features

• Size 5 designation fits 5/32-inch diameter blind rivets
• Outside diameter of 0.437 inches spreads clamping load across a wider surface area
• Inside diameter of 0.156 inches for consistent rivet mandrel clearance
• Thickness of 0.0625 inches (1/16 inch) keeps stack-up minimal
• Zinc-plated steel construction provides moderate corrosion resistance
• 500-piece pack quantity supports high-volume or multi-job use

Compatibility

Designed as an OEM-style replacement and standard accessory backup washer for use with Size 5 blind rivets measuring 5/32 inch in diameter across general fabrication, HVAC, and sheet metal assembly applications.

Installation Notes

Backup washers are installed by placing the washer over the rivet mandrel on the blind side or the setting side of the joint before driving the rivet. No special tools beyond a standard rivet gun are required. Ensure the base material hole diameter is not significantly oversized before relying on a backup washer alone to restore pull-through resistance. Installers should follow applicable structural or manufacturer guidelines when backup washers are used in load-bearing connections.