3M Fibre Disc, 381C

3M Fibre Disc, 381C

Regular price $1.17 Sale

  • Heavy weight fibre backing is tough and durable
  • Versatile disc can tackle many applications, from grinding to blending
  • Used with portable tools for easier access of workpiece
  • Closed-coat construction provides good grain density and durability
  • Resin bond withstands heat and stabilizes the disc under pressure and heat to increase productivity



Application Category
Blending/Deburring, Grinding/Metal Stock Removal
Finishing, Grinding
Backing Material
Center Hole Diameter
0.62 Inch, 0.87 Inch
Center Hole Diameter (Metric)
15.748 mm, 22.098 mm, 22.1 mm
Coat Type
Closed Coat
Converted Form
Fibre Disc
5 Inch, 7 Inch
Diameter (Metric)
114.3 mm, 127 mm
Equipment - Machines
Right Angle Grinders
Form Type
For Use On
Carbon Steel
24, 36
Marine, Metalworking, MRO
12000, 13300, 15000, 6600, 8600
Mineral Type
Aluminum Oxide
Primary Application
Metalworking, Other Door Assembly Applications
Product Form
Sub Industries
Metal Fabrication
Carbon Steel
US Govt Contract Number


The 3M™ Fibre Disc 381C is a versatile and general purpose metalworking disc, designed to help with a variety of applications from grinding, weld removal & finishing to blending on common metals like carbon steel.


Altogether, fiber discs are durable abrasive discs that deliver a fast cut for grinding and weld removal, and they come in a range of sizes to correspond to large or small welds.
General purpose disc for weld removal, grinding and blending


Durable and Dependable 
The 3M™ Fibre Disc 381C is engineered by adhering aluminum oxide mineral to a fibre backing. The closed coat construction on 3M™ Fibre Disc 381C means mineral grains cover nearly 100% of the backing, so the abrasive is durable under pressure. The stiff fibre backing is extremely durable, withstanding wear, while standing up to tough applications like beveling. 

Tips for Optimal Use 
Altogether, fiber discs are durable abrasive discs that deliver a fast cut for grinding and weld removal, and they come in a range of sizes to correspond to large or small welds. Fiber discs also work well for blending (creating a smooth surface after weld removal) and provide a consistent finish over the workpiece. These discs may be used with portable tools, facilitating easier access with the workpiece. For optimal performance, the disc should be used with a face plate of the appropriate density for the application—a lighter density face plate for finer grade applications and a harder density face plate for more coarse grinding applications. Using the correct face plate for the application ensures that the abrasive mineral will re-sharpen, maximizing the life of the abrasive. 
3M™ Fibre Disc 381C
Resin bond aluminum oxide provides durability and aggressive stock removal

Good for General Purpose Metalworking 
When it comes to the 3M™ Fibre Disc product offerings, we recommend operators choose the performance level suited to their unique project needs. 3M™ Fibre Disc 381C offers an economical solution for a general purpose metalworking disc, because it can perform well on a variety of projects without sacrificing performance. Given its versatility, you'll find the 3M™ Fibre Disc is applicable in many markets, as evidenced by its use in the marine and metalworking industries as well as in maintenance and repair operations. 3M Fibre Disc 381C is a great multi-purpose disc that's good to have on hand.