Norton 63642543426 Disc Backing Pad Locking Nut

Product Description

The NORTON 63642543426 is a hard-density disc backing pad with a locking nut design, built to support abrasive discs in grinding and surface preparation applications. It features a 5/8-11 female thread interface, which is the standard spindle thread found on most angle grinders and disc grinders used in HVAC fabrication, mechanical, and general trade work. The hard backing density provides firm, consistent support across the disc face, helping maintain even stock removal and disc contact. Maximum rated speed is 6,600 RPM. Installation and use must stay within that RPM limit to avoid disc failure and injury.

This backing pad is suited for trades professionals who use angle grinders or disc grinders for cutting, grinding, or finishing metal, concrete, or masonry. Common applications include HVAC sheet metal work, pipe preparation for welding or brazing, electrical conduit work, and general mechanical fabrication. The locking nut style allows for quick disc changes on the job site. The 5/8-11 female thread fits the standard male spindle on most corded and cordless angle grinders in the 4.5-inch to 7-inch class.

Key Features

• Locking nut design for secure disc retention and fast disc changes
• 5/8-11 female thread fits standard angle grinder spindles
• Hard density backing for firm, even disc support during aggressive grinding
• 6,600 RPM maximum speed rating
• Sold individually, one pad per package

Compatibility

Designed for use with angle grinders and disc grinders equipped with a standard 5/8-11 male threaded spindle. No specific model compatibility data was provided in the product input.

Installation Notes

Disconnect and de-energize the grinder before mounting or removing the backing pad. Thread the pad onto the spindle by hand until fully seated, then secure per the tool manufacturer torque guidance. Always verify the grinder free-speed does not exceed the 6,600 RPM maximum rating marked on this pad before use. Wear appropriate PPE including eye protection and gloves when operating angle grinders with abrasive discs.