3M 7100199420 Hookita 321U Disc 5 Inch 220 Grit

Product Description

The 3M 7100199420 is a Hookita Blue Abrasive Disc in the 321U series, designed for paint preparation and body repair sanding applications. The disc uses a blended mineral construction combining ceramic grain with aluminum oxide for consistent cut rate and finish across multiple stages of surface work. At 5 inches in diameter and 220 grit, it targets intermediate sanding steps where material removal and surface refinement must be balanced. A multi-hole pattern promotes dust extraction and reduces loading during use. Installers and body technicians working in automotive refinishing environments are the primary users.

This disc is suited for automotive paint prep, body filler sanding, primer leveling, and surface finishing in both production and detail repair settings. The multi-hole format aligns with most standard backup pads, making it compatible with common dual-action and random orbital sanders used in body shops and refinishing bays. The 220 grit rating positions this disc for finish sanding prior to sealer or basecoat application.

Key Features

• Blended ceramic and aluminum oxide mineral abrasive for balanced cut and finish performance
• Multi-hole disc pattern supports dust extraction and reduces surface loading
• Anti-loading coating helps keep the cutting surface clear of debris during use
• Hookita attachment system allows fast disc changes without adhesive backing
• Upgraded resin bond improves disc durability and consistency across the cut
• 5 inch diameter and 220 grit suited for intermediate to finish-stage paint prep

Compatibility

Designed for use with Hookita-compatible backup pads and standard 5 inch random orbital or dual-action sanders commonly used in automotive body and refinishing applications.

Installation Notes

Disc changes should be made with the sander powered off and disconnected from the air supply or electrical source. Verify that the backup pad is rated for the disc diameter and attachment style before mounting. Inspect the disc for tears or delamination before each use and discard any disc showing damage. Follow shop ventilation and respiratory protection requirements when sanding painted or coated surfaces.

Technical Specifications

• Diameter: 5 inches
• Grit: 220
• Abrasive Material: Ceramic Aluminum Oxide
• Attachment Type: Hookita
• Hole Pattern: Multi-hole
• Package Weight: 2.963 pounds
• Package Length: 13.8 inches
• Package Width: 5.9 inches
• Package Height: 6.3 inches
• UPC: 051131362579

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100199420