3M 7000028420 Disc Retainer Nut 5/8-11 Internal Thread

Product Description

The 3M 7000028420 is a disc retainer nut designed to secure abrasive discs to disc pad hubs, face plates, and fibre disc holders used in grinding and finishing applications. It features a 5/8-11 internal thread with a thread length of 5/8 inches and includes 1/4 inch diameter holes sized for use with a spanner wrench, allowing controlled installation and removal. This hardware component is a standard fastener in angle grinder setups and surface preparation work across metal fabrication, industrial maintenance, and construction trades.

This retainer nut is compatible with disc pad hub and face plate assemblies commonly found on angle grinders and right-angle disc tools. It is well suited for metal finishing, weld grinding, and surface preparation tasks in both shop and field environments. Sold in a case quantity of 10, it supports regular replacement schedules in high-volume production or maintenance operations.

Key Features

• 5/8-11 internal thread for secure disc retention on standard threaded spindles
• 5/8 inch thread length provides positive engagement with hub assemblies
• 1/4 inch diameter spanner wrench holes allow controlled torque during installation and removal
• Compatible with 3M disc pad hubs, face plates, and fibre disc holders
• Sold in a case quantity of 10 for maintenance and production environments

Compatibility

Designed for use with all 3M disc pad hub and face plates and 3M fibre disc holders.

Installation Notes

Installation is typically performed by metalworkers, fabricators, or maintenance technicians using a spanner wrench sized to the 1/4 inch holes. Always power down and disconnect the grinder from its power source before removing or installing the retainer nut. Ensure the spindle threads are clean and free of debris before threading on the nut. Follow the tool and abrasive manufacturer guidelines for proper disc assembly and guard placement.

Technical Specifications

• Internal Thread: 5/8-11
• Thread Length: 5/8 inches
• Spanner Wrench Hole Diameter: 1/4 inches
• Weight: 0.125 pounds
• Package Quantity: 10 per case
• UPC: 00051144056200

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000028420