3M 7000118110 Psa Disc 320 Grit 5 in Aluminum Oxide 175 Pack

Product Description

The 3M 7000118110 is a pressure-sensitive adhesive (PSA) abrasive disc engineered for finish sanding applications. It uses aluminum oxide grain on an A-weight paper backing, delivering consistent cut and surface finish at 320 extra-fine grit. The disc measures 5 inches in diameter and mounts directly to PSA-compatible backup pads without fasteners or hook-and-loop hardware. Each pack contains 175 discs. This product is part of the 3M 216U series and is designed for use by finishing tradespeople, auto body technicians, woodworkers, and surface prep professionals who need repeatable results across high-volume sanding work.

This disc is suited for fine finish sanding on wood, metal, primers, and composite surfaces in both shop and field environments. At 320 grit, it is used in final preparation stages before topcoat application, between-coat scuffing, or light defect removal on previously sanded surfaces. The flexible paper backing conforms to moderate contours, making it useful on slightly curved panels or furniture components. Compatible with random orbital sanders that accept 5-inch PSA discs. No vacuum holes are present, so this disc is intended for use without dust extraction through the pad.

Key Features

• 320 extra-fine grit aluminum oxide abrasive for consistent finish-stage cutting
• Pressure-sensitive adhesive backing for fast, tool-free disc changes
• A-weight paper backing provides flexibility for light contour sanding
• No vacuum holes — suited for solid backup pads without dust extraction ports
• Gold disc color aids visibility during use and helps identify grit stage
• 175 discs per pack supports high-volume production workflows

Compatibility

Designed for use with random orbital sanders that accept 5-inch PSA backup pads. No vacuum holes are present; this disc is not compatible with through-pad dust extraction systems.

Installation Notes

Installation of PSA discs requires a clean, dry backup pad free of adhesive residue or contamination for proper bonding. Power down the sander and disconnect it from power before mounting or removing discs. Apply firm, even pressure across the disc face when attaching to the backup pad to ensure full adhesive contact. Discard discs that show signs of loading, tearing, or loss of adhesion to maintain consistent surface finish quality.