3M 7100199418 Hookit 321U Disc 5 Inch 150 Grit

Product Description

The 3M 7100199418 is a Hookit 321U abrasive disc engineered for automotive paint preparation and body repair work. It uses a blended mineral system combining ceramic grain with aluminum oxide to deliver consistent cut rate and extended disc life across a range of sanding stages. The disc measures 5 inches in diameter and carries a 150 grit rating, placing it in the medium-fine range suited for finishing and featheredging. An anti-loading coating keeps the cutting surface clear of dust and debris, reducing downtime from disc changes. The Hookit hook-and-loop attachment system allows fast, tool-free disc swaps on compatible backup pads.

This disc is intended for professional automotive technicians and body shop painters performing paint prep, primer sanding, and surface leveling on vehicle body panels. The multi-hole pattern is designed to align with most orbital sander backup pads for effective dust extraction when used with a vacuum or dust collection system. It is appropriate for use on automotive topcoats, primers, fillers, and body repair substrates in both production and refinishing environments.

Key Features

• Blended ceramic and aluminum oxide mineral for balanced cut rate and durability
• 150 grit rating suited for medium-fine paint prep and featheredging applications
• Anti-loading coating resists clogging from sanding dust and debris
• Multi-hole pattern supports dust extraction and aligns with most backup pads
• Hookit hook-and-loop attachment allows fast disc changes without tools
• Upgraded resin bond improves disc durability and surface finish consistency

Compatibility

Designed for use with Hookit-compatible hook-and-loop backup pads on random orbital and orbital sanders used in automotive body and paint applications.

Installation Notes

Installation of abrasive discs should be performed by trained automotive technicians or abrasives users familiar with orbital sander operation. Confirm the backup pad is compatible with Hookit hook-and-loop attachment before mounting the disc. Inspect the disc for tears or damage before each use and do not exceed the rated operating speed of the sander. Always use appropriate respiratory protection and dust collection when dry sanding.

Technical Specifications

• Disc Diameter: 5 inches
• Grit: 150
• Abrasive Mineral: Ceramic Aluminum Oxide Blend
• Attachment Type: Hookit Hook-and-Loop
• Hole Pattern: Multi-Hole
• Package Weight: 2.963 pounds
• Package Length: 13.8 inches
• Package Width: 5.9 inches
• Package Height: 6.3 inches
• Unit of Measure: Box
• Minimum Order Quantity: 4
• UPC: 051131362555

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100199418