Norton 77696097542 Flap Disc 4-1/2 in Type 27 Aluminum Oxide

Product Description

The NORTON 77696097542 is a Type 27 non-woven flap disc designed for surface finishing, blending, and light material removal. It measures 4-1/2 inches in diameter with a 7/8 inch center arbor hole and is constructed with an aluminum oxide abrasive bonded to a fiberglass backing. Rated at a maximum of 13,300 RPM, this disc is built for use on angle grinders in demanding shop and field environments. The very fine grade makes it well-suited for final surface prep, deburring, and finishing passes where controlled stock removal and a consistent surface finish are the primary goals. Licensed tradespeople and fabrication professionals are the primary installers and users of this product.

This flap disc is used in metal fabrication, welding cleanup, and surface conditioning applications across residential and commercial settings. The Type 27 flat profile is the standard choice when working on flat surfaces or inside corners, allowing the disc to sit flush against the workpiece for even contact. The non-woven construction provides a more flexible, conforming cut compared to coated abrasive flap discs, making it effective for blending welds, removing light oxidation, and prepping metal surfaces before coating or inspection. Fabricators, pipefitters, and ironworkers commonly reach for this disc during finishing stages of a project.

Key Features

• Type 27 flat profile for flush surface contact on flat stock and inside corners
• Aluminum oxide abrasive material for consistent cutting action on ferrous and non-ferrous metals
• Non-woven construction provides flexibility and conformability for blending and finishing
• Fiberglass backing offers structural support and durability under high-speed use
• Very fine grade suited for final finishing, deburring, and surface prep before coating
• Rated to 13,300 RPM for compatibility with standard 4-1/2 inch angle grinders

Compatibility

Designed for use with standard 4-1/2 inch angle grinders equipped with a 7/8 inch arbor, which is the most common spindle configuration in this disc size class.

Installation Notes

Installation is performed by grinding professionals, fabricators, or tradespeople familiar with angle grinder operation. Always confirm the grinder's rated RPM meets or exceeds the disc's 13,300 RPM maximum before mounting. Power down and disconnect the grinder from its power source before changing discs. Inspect the disc for damage prior to use and ensure the arbor nut is properly tightened with the appropriate wrench before operating.