3M 7100010666 Hookit 236U Disc 5 Inch P400 Grit

Product Description

The 3M 7100010666 is a Hookit 236U coated abrasive disc designed for high-production sanding and general-purpose surface finishing. Built on a C-weight paper backing with premium aluminum oxide mineral, this 5-inch disc delivers aggressive cut and extended abrasive life across a wide range of materials. The open-coat construction and load-resistant coating minimize disc loading, keeping the surface cutting efficiently throughout its service life. The Hookit attachment system allows fast disc changes without tools, reducing downtime in demanding production environments.

This disc is suited for both industrial and professional finishing applications on paint, primer, wood, metal, plastic, and composites including fiberglass. At P400 grit, it is appropriate for fine sanding, surface prep before topcoat, and finishing stages where surface smoothness is critical. It is commonly used in automotive refinishing, woodworking shops, metal fabrication, and composite panel work. The 12000 RPM maximum speed rating accommodates most standard random orbital and rotary sanders used in trade and production settings.

Key Features

• Premium aluminum oxide mineral for fast cutting and durability across multiple surface types
• C-weight paper backing provides extra support and durability for aggressive sanding passes
• Open-coat construction reduces loading and extends usable abrasive life
• Load-resistant coating helps maintain cut rate on paint, primer, and soft materials
• Hookit attachment system enables fast, tool-free disc changes and disc reuse
• Rated to 12000 RPM for compatibility with common production sanders

Compatibility

Designed for use with Hookit-compatible random orbital and rotary sanding tools. Suitable for sanding paint, primer, wood, metal, plastic, and composites including fiberglass in both high-production and general-purpose applications.

Installation Notes

This disc is installed and removed by hand using the Hookit hook-and-loop attachment system — no tools required. Ensure the backing pad on the sander is clean and in good condition before attaching the disc, as debris or a worn pad will reduce adhesion and disc life. Do not exceed the rated 12000 RPM maximum speed. Inspect the disc before each use and discard any disc showing tears, edge damage, or unusual wear.

Technical Specifications

• Disc Diameter: 5 inches
• Grit: P400
• Abrasive Mineral: Aluminum Oxide
• Backing Weight: C-weight paper
• Coat Type: Open coat
• Attachment Type: Hookit hook-and-loop
• Maximum Speed: 12000 RPM
• Package Length: 8.9 inches
• Package Width: 5.7 inches
• Package Height: 6.2 inches
• Weight: 0.01 pounds
• UPC: 00051141555874

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100010666