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SKU 7010359609
Legacy SKU 60060006214
UPC 00051144021451
Product Number 346U

3M™ Paper Sheet 346U is constructed of aluminum oxide and comes in a range of grades and sizes to accommodate many different projects. The paper backing is durable for coarse sanding, yet flexible enough to be used on curved surfaces. Its cut-rate and durability make this an excellent choice for blending the joints of connecting pieces in wood- and metal-working.

  • Tough aluminum oxide abrasive cuts fast and performs well on many surfaces
  • Load resistant open-coat feature enables longer use before replacement
  • Strong, D-weight paper backing supports aggressive sanding
  • Sheets are conformable to various workpieces and usable by either hand or machine
  • Sheets come in a number of sizes to accommodate various applications
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On it's way to you December 7   


Minimum Order 2,000 Sheets
Order Increment 2,000 Sheets
  Immense Durability
  Reduces Abrasive Costs
  Lowest Price Per Item
Product Dimensions
Imperial Metric
Width 3 in 76.2 mm
Length 8 in 203.2 mm
Shipping Dimensions
Weight 31.904 lb
Length 18.1 in
Width 8.9 in
Height 11.8 in
Color Gold
Grit 80


  1. What is 3M™ Paper Sheet 346U made of?

    The 3M™ Paper Sheet 346U is made of durable, long-lasting aluminum oxide abrasive grains that are bonded to a tough paper backing.

  2. What makes the 3M™ Paper Sheet 346U different from other sandpaper sheets?

    The unique coating helps resist loading while providing consistent cut rates and finishes. With its exceptional balance between cutting power and finesse, this sheet can be used for moderate removal or finishing.

  3. How many sheets come in a case of the 3M™ Paper Sheet 346U?

    Each case comes with a total of 2000 sheets containing inner packaging with each package holding up to about two hundred sheets. We offer high-quality products in varying quantities to ensure you find just what you need for your specific application.

For industrial/occupational use only. Not for consumer sale or use.
3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use.  Unless specifically stated otherwise on the applicable product packaging or literature, these products are not intended, labeled, or packaged for sale to or use by consumers (e.g., for home, personal, primary or secondary school, recreational/sporting, or other uses not described in the applicable product packaging or literature), and must be selected and used in compliance with applicable health and safety regulations and standards (e.g., U.S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and other limitations, and the user must take any action required under any recall, field action, or other product use notice.  Misuse of 3M industrial and occupational products may result in injury, sickness, death, or property damage.  For help with product selection and use, consult your on-site safety professional, industrial hygienist, or other subject matter expert.
Product Description

Product Description

Aluminum oxide is a highly durable mineral that maintains sharp points on the grains for a longer period compared to natural abrasives like emery or garnet. The sandpaper features an open-coat construction where the abrasive grains are attached with some space between them. This design helps minimize the accumulation of dust on the paper's surface, preventing the abrasive points from getting clogged. The clogging of abrasive points often occurs when sanding soft materials, which can significantly reduce the lifespan of the sandpaper sheet.

Brochures, Catalogs & Data Sheets
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