Belt
3M Products
3M Products Cubitron II 33439 786F Series File Belt, 3/8 in W x 13 in L, 60+ Grit, Purple
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Overview
Built for the job.
Our 3M™ Cubitron™ II file belts 786F is a 3M™ best in class abrasive belt, designed for use with the 3M™ file belt sander, for tasks like grinding out rivets and removing spot welds. 3M™ precision shaped grain is resin bonded on a heavy-duty backing for a more consistent finish, cooler operation and 2X more belt life.…
Why Pros Choose 3M Products MMM
- Features 3M™ tough and best in class Cubitron™ II mineral
- Grains of ceramic/aluminum oxide blend are precisely shaped, uniformly sized and vertically oriented
- Slices through hard metal for fast cut
- Cubitron™ II abrasives run cooler, reducing risk of metal discoloration/oxidation and heat related stress cracks
- A grinding aid further enhances cooler running on high strength steel
- Exceptionally long-lasting belt performs consistently and reliably throughout its life
- Used with the 3M™ file belt sander, easily grinds out rivets and spot welds
How to Use
For tough detail work like cleaning, deburring, blending and finishing as well as working in small confined spaces
Compatibility
Compatible substrates: Steel, Aluminum.
Specifications
| Part No. | 33439 |
|---|---|
| Product Line | MMM |
| MFR Model | 33439 |
| Application | For tough detail work like cleaning, deburring, blending and finishing as well as working in small confined spaces |
| Manufacturer | 3M Products |
| Alternate Part Number-1 | 60455081988 |
| UPC | 051131334397 |
| Brand | Cubitron™ II |
| Maximum Sale Quantity | 5 |
| Maximum Sale Day | 7 |
| Belt Width (in) | 3/8 |
| Grit | 60+ |
| Belt Length (in) | 13 |
| Abrasive Material | Precision Shaped Ceramic |
| Wet/Dry | Dry |
| Series | 786F |
| Color | Purple |
| Backing Material | Polyester |
About 3M Products
3M Products is a trusted manufacturer of professional auto body and refinish products used by collision repair shops and restoration specialists across North America.
Frequently Asked Questions
What surfaces can 3M Products MMM be used on?
3M Products MMM is compatible with Steel, 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 Products MMM?
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.
Is this 3M Products product genuine?
Yes. autofxmart is an authorized distributor of 3M Products 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 Products MMM?
The MPN for 3M Products MMM is 33439. Use this number when cross-referencing against TDS, SDS, or legacy supplier catalogs.
Documents & Safety
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 Steel, 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 33439. Use this number when cross-referencing against TDS, SDS, or legacy supplier catalogs.
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