3M™ Hookit™ Blue Abrasive Disc 321U, 36170, 6 in, 40, Multi-hole, 50 Discs/Carton, 4 Cartons/Case

The 3M™ Hookit™ Blue Abrasive Disc 321U delivers best-in-class performance at every stage of paint prep and coatings removal. Premium aluminum oxide mineral abrasive is blended with ceramic grain for a full range of sanding applications. The multi-hole discs feature a specially-designed pattern that reduces loading, extends disc life and aligns with most backup pads. Hookit™ attachment makes disc changes easy.
Special Price $120.05 Regular Price $141.24
UPC 00051131361706
3M ID 7100091243
Packaging Carton
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Best-in-Class Performance in Every Grade

Part of a full line of 3M™ Blue Abrasives, the 3M™ Hookit™ Blue Abrasive Disc is engineered for best-in-class cut, life and efficiency across your entire shop. The disc features a tough ceramic blended with premium aluminum oxide mineral for just the right balance. 3M™ Blue Abrasives deliver consistently excellent results in a minimum amount of time, on jobs ranging from aggressive paint removal and fresh filler sanding to blend preparation and sanding primer. Discs are available in a wide range of sizes and grades.

Dust Extraction Features Enhance Performance and Disc Life

The multi-hole pattern on this disc is specially designed to capture dust and keep it away from the abrasive surface. This specially-designed hole pattern reduces loading and extracts dust more efficiently compared to standard 6- or 7-hole disc configurations. It includes alignment guides across the disc, making it fast and easy to align with nearly any backup pad. The mineral blend on the 3M™ Hookit™ Blue Abrasive Disc is bonded using upgraded resins for enhanced durability. An anti-loading coating helps keep dust from gathering between the abrasive grains for a faster cut and for consistent performance throughout the life of the disc.

The Hookit™ Attachment System

The Hookit™ attachment system has a hook-and-loop feature which makes disc attachment, removal, and re-attachment clean and easy. It also facilitates use and re-use of the disc for maximum product life. Hookit™ discs have a brushed nylon loop backing of the type most commonly used in everyday hook-and-loop applications. 3M™ Hookit™ disc pads (sold separately) feature hooks which grip the brushed nylon loop backing. it's simple: just attach the disc and start sanding. The disc removes just as cleanly and easily. The Hookit™ system is designed for work spaces and applications where adhesive backed discs may become contaminated by dust, dirt, or debris.

Better Science for Better Sanding from 3M

3M™ Blue Abrasives family is designed as a cost-effective, high-performance upgrade for any sanding application in body repair and paint preparation. From its balanced, engineered mineral blend to its multi-hole pattern for dust extraction, the 3M™ Hookit™ Blue Abrasive Disc is another way that 3M applies science to deliver best-in-class performance for professionals in paint preparation and auto repair.


  • A best-in-class abrasive for a variety of applications
  • Engineered ceramic mineral blend is balanced for maximum abrasive performance in its class
  • Discs available in mutli-hole pattern for excellent dust extraction or in no-hole format
  • Anti-loading coating prevents dust and debris from clogging the cutting surface
  • Upgraded resins improve durability and finish
More Information
3M ID 7100091243
Part number 36170
Keywords 36170
Global Product Hierarchy Abrasives > Abrasive Discs > Paper Discs
Abrasive Material Ceramic Aluminum Oxide
Application Clear Coat
Backing Material Paper
Backing Weight C Weight
Bond Type Resin
Center Hole Diameter (Imperial) 0.0 NP
Color Family Blue
Grit 40
Product Color Blue
Product Number 321U
Product Type simple
Quantity 0
Trademark 1 3M™
Trademark 2 Hookit™
Country of Origin Cameroon
Sales Unit EA
SAP Shelf Life In Days 0
Base - Billing Unit EA
Base - Customary Width Dimension 6.0 INCH
Base - Metric Gross Weight 17.2 G
Base - Metric Width Dimension 0.152 M
Base - Item Quantity 1
Base - Unit EA
Unit of Use - Billing Unit EA
Unit of Use - Customary Cubic Dimension 2.8350411031530722 ci
Unit of Use - Customary Gross Weight 0.03791950909579894 lbs
Unit of Use - Customary Net Weight 0.03306933932773164 lbs
Unit of Use - Metric Cubic Dimension 46.458 CCM
Unit of Use - Metric Net Weight 15.0 G
Unit of Use - Item Quantity 1
Unit of Use - Total Unit Quantity 1
Unit of Use - Previous Packaging Level Quantity 1
Unit of Use - Item Unit EACH
Unit of Use - Unit EA
Consumer - Billing Unit EA
Consumer - Customary Cubic Dimension 95.04472552252192 ci
Consumer - Customary Gross Weight 1.8000743707395255 lbs
Consumer - Customary Net Weight 1.6534669663865817 lbs
Consumer - Customary Height Dimension 2.5196850393700787 in
Consumer - Customary Length Dimension 6.141732283464567 in
Consumer - Customary Width Dimension 6.141732283464567 in
Consumer - Metric Cubic Dimension 1557.504 CCM
Consumer - Metric Net Weight 750.0 G
Consumer - Metric Height Dimension 6.4 CM
Consumer - Metric Length Dimension 15.6 CM
Consumer - Metric Width Dimension 15.6 CM
Consumer - Item Quantity 50
Consumer - Total Unit Quantity 50
Consumer - Previous Packaging Level Quantity 50
Consumer - Previous Packaging Level Unit EACH
Consumer - Item Unit EACH
Consumer - Unit KAR
Shipper - Billing Unit EA
Shipper - Customary Cubic Dimension 567.0097462242169 ci
Shipper - Customary Gross Weight 7.583901819159789 lbs
Shipper - Customary Net Weight 6.613867865546327 lbs
Shipper - Customary Height Dimension 7.283464566929134 in
Shipper - Customary Length Dimension 11.299212598425196 in
Shipper - Customary Width Dimension 6.889763779527559 in
Shipper - Metric Cubic Dimension 9291.625 CCM
Shipper - Metric Weight 3.44 KG
Shipper - Metric Net Weight 3.0 KG
Shipper - Metric Height Dimension 18.5 CM
Shipper - Metric Length Dimension 28.7 CM
Shipper - Metric Width Dimension 17.5 CM
Shipper - Item Quantity 200
Shipper - Total Unit Quantity 200
Shipper - Previous Packaging Level Quantity 4
Shipper - Previous Packaging Level Unit CTNS
Shipper - Item Unit EACH
Shipper - Unit CS
Pallet - Billing Unit EA
Pallet - Customary Cubic Dimension 94159.63713817191 ci
Pallet - Customary Gross Weight 1106.7205561680855 lbs
Pallet - Customary Net Weight 912.7137654453932 lbs
Pallet - Customary Height Dimension 48.818897637795274 in
Pallet - Customary Length Dimension 48.031496062992126 in
Pallet - Customary Width Dimension 40.15748031496063 in
Pallet - Metric Cubic Dimension 1.543 M3
Pallet - Metric Net Weight 414.0 KG
Pallet - Metric Height Dimension 1.24 M
Pallet - Metric Length Dimension 1.22 M
Pallet - Metric Width Dimension 1.02 M
Pallet - Item Quantity 27600
Pallet - Total Unit Quantity 27600
Pallet - Previous Packaging Level Quantity 138
Pallet - Previous Packaging Level Unit BOX
Pallet - Item Unit EACH
Pallet - Unit PAL
Pallet - Pallet Layer Quantity 6
Pallet - Shipping Container Per Layer Quantity 23
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