Norton 63642543461 Abrasive Disc 66NS Short Retainer Nut

Product Description

The NORTON 63642543461 is a 66NS short retainer nut designed to secure abrasive discs on angle grinders and disc sanders. It features a 5/8-11 female thread pattern, the standard thread specification used across the majority of right-angle grinder spindles in trade and industrial applications. This hardware component is sold individually and is a direct replacement or spare for worn, damaged, or lost retainer nuts in existing tool setups. Grinding, metalworking, and fabrication professionals rely on proper retainer hardware to maintain safe disc seating and consistent performance during abrasive operations.

This retainer nut is suited for use in metal fabrication shops, construction sites, and maintenance environments where angle grinders and surface grinding equipment are in regular service. The short profile of the 66NS style is intended for applications where tool clearance is limited or where a low-profile clamping solution is preferred over standard or flange-nut configurations. It pairs with compatible backing pads and abrasive disc assemblies using the 5/8-11 spindle thread standard.

Key Features

• 66NS short retainer nut profile for low-clearance disc clamping applications
• 5/8-11 female thread matches the industry-standard grinder spindle specification
• Compact design suitable for use with standard and depressed-center abrasive discs
• Sold as a single unit for targeted replacement without bulk purchasing
• Lightweight at 0.1 pounds for minimal tool-balance impact

Compatibility

Designed as an OEM-style replacement retainer nut for angle grinders and disc sanders equipped with a 5/8-11 male spindle thread.

Installation Notes

Installation and removal should be performed by a qualified grinding equipment operator or tool technician. Always power down and unplug or lock out the grinder before servicing the disc assembly. Use the appropriate spanner wrench for the retainer nut to avoid rounding the flats. Overtightening can damage the disc or backing pad, so follow the tool manufacturer torque guidance where available.