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SKU 7000120222
Legacy SKU 60510026408
UPC 00051144021178
Part Number 02117
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 500 Sheets
Order Increment 500 Sheets
  Immense Durability
  Reduces Abrasive Costs
  Lowest Price Per Item
Product Dimensions
Imperial Metric
Width 11 in 279.4 mm
Length 9 in 228.6 cm
Shipping Dimensions
Weight 50.8 lb
Length 18.938 in
Width 9.625 in
Height 12.25 in
Color Gold
Grit P50


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

    3M™ Paper Sheet 346U is made with a blend of premium aluminum oxide mineral and fiber-reinforced, B-weight latex-saturated backing paper.

  2. How many sheets are in each case of this product?

    There are 500 sheets per case of 3M™ Paper Sheet 346U.

  3. How do I choose the right grit for my project?

    The grit selection largely depends on the level of aggressiveness you need for your sanding application. For rougher surfaces such as heavy rust or paint removal, we recommend using lower numbers like P36 to P80. For finer finishes like finishing an auto body surface, select higher numbers from P120 all the way up to ultra-fine grades such as P1000.

  4. Is there any warranty on this product?

    We stand behind our products and want every satisfied customer. As a result, we offer limited warranties regarding both our material manufacturing performance and consistency with written specifications communicated at time-of-sale including proper use applications and storage conditions.

  5. Can these be cut into smaller pieces if needed for the job at hand?

    Yes! If sheet sizes aren't convenient for your specific job/project or workshop layout/organization/layout; it's fine—our abrasive sheets can be easily hand-cut or machine-cut to fit your unique needs while retaining consistent abrasive grain patterns across other parts that were not trimmed by hand or machines.

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 issue of loading, which often occurs when sanding soft materials, is effectively addressed by this open-coat construction. By reducing the clogging of the abrasive, the usable life of the sandpaper sheet is extended.

Brochures, Catalogs & Data Sheets
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