3M™ Paper Sheet 346U

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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

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For industrial/occupational use only. Not for consumer sale or use.

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Overall Length (Imperial)

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Grit

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Overall Width (Imperial), Overall Length (Imperial) and Grit

Specifications

Attribute Name	Value
Abrasive Material	Aluminum Oxide
Alternative Sale Availability	6. This item is for industrial use only and there are no VOC restrictions.
Application	Finishing
Backing Material	Paper
Backing Weight	D Weight
Brand	3M™
Coat Type	Open Coat
Color Family	Yellow
Equipment - Machines	Hand Sanding
Flex Type	Full-flex
For Use On	Aluminum, Brass, Bronze, Copper, Fiberglass, Fibreglass, Gelcoat, Glass, Hardwood, Paint, Plastic, Soft Metals, Softwood
Grit	36, 80, P36, P40, P50, P60
Industries	Composite, Marine, Metalworking, MRO, Paint Preparation, Woodworking
National Stock Number	5350000967815, 5350002414861, 5350002598714, 5350011876559
Overall Length (Imperial)	17.5 in, 2.75 in, 8 in, 9 in
Overall Length (Metric)	203.2 mm, 228.6 cm, 228.6 mm, 444.5 mm, 69.9 cm
Overall Width (Imperial)	11 in, 17.5 in, 2.75 in, 3 in, 3.667 in
Overall Width (Metric)	279.4 mm, 444.5 mm, 69.85 mm, 76.2 mm, 93.142 mm
Product Color	Gold
Product Form	Sheet
Sanding Type	Dry
Size (Imperial)	11 in x 9 in, 17.5 in x 2.75 in, 2.75 in x 17.5 in, 3 in x 8 in, 3.667 in x 9 in
Size (Metric)	279.4 mm x 228.6 cm, 444.5 mm x 69.9 cm, 69.85 mm x 444.5 mm, 76.2 mm x 203.2 mm, 93.142 mm x 228.6 mm
Substrate	Aluminum, Brass, Bronze, Copper, Fiberglass, Gelcoat, Glass, Hardwood, Paint, Plastic, Soft Metal, Softwood

Product Details

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

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.

Aluminum oxide is a very hard mineral that maintains sharp points on the grains much longer than natural abrasives such as emery or garnet. The abrasive grains are adhered to the sandpaper with some space between them, known as open-coat construction, to minimize the buildup of dust on the surface of the paper, which would otherwise load the abrasive points. Loading often results from sanding soft materials and can clog the abrasive, shortening the usable life of the sandpaper sheet.

Learn more about 3M™ Industrial Products for Metalworking (PDF, 13 Mb)

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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.