Disc
3M
3M 21664 XT Pro Extra Cut Disc 6 in Extra Coarse Aluminum Oxide Green
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Overview
Built for the job.
Scotch-Brite™ clean and strip XT Pro extra cut disc features aluminum oxide abrasive mineral incorporated into an open nylon web. It is designed to remove heavy rust, thick paint and corrosion while also scratching the base material underneath, which can save you time. The highly conformable, high strength…
Why Pros Choose 3M MMM
- Quickly removes heavy rust, thick paint, corrosion and cleans welds
- Aluminum oxide mineral aggressively removes top layer and cleans to the bare metal underneath
- High conformability provides a larger contact patch for faster removal rates
- High strength fiber resists chunking and performs well on edges
- Resists loading for consistent cutting action
- High speed rating and low vibration
How to Use
Aerospace, Automotive, Building and Construction, Design and Construction, Heavy Industrial, Manufacturing, Marine, Metalworking, Mining, Oil and Gas, Rail, Transportation
Compatibility
Compatible substrates: Bare Metal, Aluminum.
Specifications
| Part No. | 21664 |
|---|---|
| Product Line | MMM |
| MFR Model | 21664 |
| Application | Aerospace, Automotive, Building and Construction, Design and Construction, Heavy Industrial, Manufacturing, Marine, Metalworking, Mining, Oil and Gas, Rail, Transportation |
| Manufacturer | 3M Products |
| Alternate Part Number-1 | 61500303591 |
| UPC | 038060216644 |
| Brand | Scotch-Brite™ |
| Center Hole Size (in) | 1/2 |
| Grade | Extra Coarse |
| Disc Diameter (in) | 6 |
| Abrasive Material | Aluminum Oxide |
| Maximum Speed (rpm) | 4000 |
| Series | XT Pro |
| Color | Green |
| Backing Material | Fiber |
| Attachment Type | Center Hole |
About 3M
3M is a global leader in abrasives, masking, and body repair products. Trusted by OEM collision centers for high-performance prep and finishing solutions.
Frequently Asked Questions
What surfaces can 3M MMM be used on?
3M MMM is compatible with Bare Metal, Aluminum. Always ensure the surface is properly cleaned, degreased, and sanded before application to achieve the strongest adhesion and a professional finish.
How fast does autofxmart ship 3M MMM?
Most in-stock orders for 3M MMM ship the same or next business day from our US warehouse. Expedited options are available at checkout. Freight-class items may require an additional 1–2 days for carrier pickup.
Is this 3M product genuine?
Yes. autofxmart is an authorized distributor of 3M products. Every unit is factory-fresh, sealed, and backed by the manufacturer's standard warranty. If you have a concern, contact support@autofxmart.com and we will make it right.
What is the manufacturer part number (MPN) for 3M MMM?
The MPN for 3M MMM is 21664. Use this number when cross-referencing against TDS, SDS, or legacy supplier catalogs.
Documents & Safety
Warning: This abrasive disc contains materials that may cause serious health hazards. Required PPE: safety glasses or face shield, protective clothing, and respirator. Key hazards include potential eye damage, skin irritation, respiratory irritation, and exposure to materials that may cause organ damage or other serious health effects. Avoid skin and eye contact. Use only with adequate ventilation. Always refer to the full SDS before use.
Why Buy from autofxmart
- Authorized distributor — authentic, factory-fresh stock.
- Fast US shipping — most orders ship within 1 business day.
- 30-day returns — buy with confidence.
- Pro-shop pricing — bulk discounts available on request.
- Expert support — questions? Email us at support@autofxmart.com.
How to apply
Steps
1Pick the right grit for the stage of work.
2Mount on your sander or backing block.
3Work evenly and let the abrasive cut.
4Step through finer grits to refine.
5Blow off and wipe the surface before the next step.
Specifications
Full data
Frequently asked
Good to know
3M Products MMM is compatible with Bare Metal, Aluminum. Always ensure the surface is properly cleaned, degreased, and sanded before application to achieve the strongest adhesion and a professional finish.
Most in-stock orders for 3M Products MMM ship the same or next business day from our US warehouse. Expedited options are available at checkout. Freight-class items may require an additional 1–2 days for carrier pickup.
Yes. autofxmart is an authorized distributor of 3M Products. Every unit is factory-fresh, sealed, and backed by the manufacturer's standard warranty. If you have a concern, contact support@autofxmart.com and we will make it right.
The MPN for 3M Products MMM is 21664. Use this number when cross-referencing against TDS, SDS, or legacy supplier catalogs.
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