Rivetking FBUP-5/P500 Blind Rivet Backup Washer Size 5 500pk

Product Description

The RIVETKING FBUP-5/P500 is a stainless steel round blind rivet backup washer designed for Size 5 rivet applications. It provides a solid bearing surface behind the blind rivet head, distributing clamp load across the base material and reducing pull-through in thin or soft substrates. With an inside diameter of 0.156 inches, an outside diameter of 0.437 inches, and a thickness of 0.0625 inches (1/16 inch), this washer is sized to work with 5/32 inch rivet diameters. The stainless steel construction resists corrosion in wet or outdoor environments. This package contains 500 washers. Installers in HVAC, plumbing, sheet metal, and general construction use these where rivet joint integrity is critical.

Blind rivet backup washers are used wherever a standard rivet head needs additional bearing support on the blind side or accessible side of a joint. Common applications include thin-gauge sheet metal panels, HVAC ductwork assemblies, enclosure fabrication, and light structural connections. The Size 5 designation matches the 5/32 inch rivet diameter standard used across many tool and fastener platforms. The 500-piece pack suits service vans, shop bins, and production runs that require consistent inventory of a single size.

Key Features

• Stainless steel construction provides corrosion resistance for indoor and outdoor applications
• Inside diameter of 0.156 inches fits 5/32 inch rivet shank with minimal clearance
• Outside diameter of 0.437 inches spreads clamp load to reduce material pull-through
• Thickness of 0.0625 inches (1/16 inch) keeps the washer profile low in tight assemblies
• Size 5 designation aligns with standard rivet sizing conventions for easy cross-referencing
• 500-piece pack provides job-ready quantity for ongoing service or production use

Compatibility

Designed for use with Size 5 blind rivets having a 5/32 inch shank diameter, following standard rivet sizing conventions used across trade and industrial fastener applications.

Installation Notes

Place the backup washer over the rivet shank before inserting through the base material so the washer seats flat against the material surface on the shop head side. Ensure the substrate surface is clean and flat for proper washer seating before setting the rivet. Use a standard rivet tool rated for the rivet material and size being installed. No special tooling beyond a conventional blind rivet tool is required for this washer.