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SKU 7000124121
Legacy SKU 70006356722
UPC 00048011579139
Product Number SJ3441

3M™ Dual Lock™ Reclosable Fastener SJ3441 is the easy and clear alternative to traditional fastening methods, such as screws, nuts or bolts. It is designed to deliver a durable, reclosable fastening solution, which can be opened and closed multiple times. This black fastener is most commonly attached by applying hot melt, epoxy or liquid adhesive.

  • Black, interlocking mushroom-shaped heads (400 stem density per square inch) provide strong, reliable and durable fastening that can be opened and closed multiple times
  • Mates with Type 170 or Type 250 stem densities to provide different strength combinations
  • Non-adhesive back for attachment with hot melt, epoxy or liquid adhesives
  • Strong fastener secures with an audible snap, verifying closure
  • An alternative to screws and bolts, this hidden fastener provides a snug fit and smooth aesthetic appearance
  • Features good temperature resistance of 220°F (104°C), though temperature resistance may change based on adhesive used
  • Suited for indoor or outdoor use
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On it's way to you April 10  


Minimum Order 1 Roll
Order Increment 1 Roll
  Multiple Application Use
  Easy To Use
  Fantastic Price
Product Dimensions
Imperial Metric
Width 6 in 152.4 mm
Length 50 yd 45.72 m
Shipping Dimensions
Weight 18.3 lb
Length 20.9 in
Width 20.9 in
Height 7.6 in
Color Black


  1. What is 3M™ Dual Lock™ Reclosable Fastener SJ3441?

    It's a black, Type 400, reclosable fastener designed for general purpose use that provides a strong bond and easy opening and closing.

  2. Is it easy to use?

    Yes! Simply peel and stick it onto surfaces. It works best on clean, dry surfaces at room temperature.

  3. Can I cut the fastener to the exact length that I need?

    Absolutely! This dual lock reclosable fastener can be easily cut with scissors or a knife to fit your specific needs.

  4. How much of the product do I get in one purchase?

    Each purchase contains one roll of dual lock reclosable fasteners measuring 6 inches wide by 50 yards long – plenty for multiple projects!

  5. . What are some common applications for this product?

    A. The versatile SJ3441 Dual Lock tape has many uses including attaching cosmetic panels; hanging signs; securing access panels; attaching cushions or headliners in seating areas such as airplanes, trains buses etc.; mounting electronic control boxes doors/panels on machines/commercial food equipment."/

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.
Unlock Simplicity

Durable and secure, 3M™ Dual Lock™ Reclosable Fastener SJ3441 has exceptional strength through its interlocking mushroom-shaped heads (400 stem density per square inch). With 3M™ Dual Lock™ Reclosable Fastener SJ3441, there is no need for any drilling or screwing. This fastener is most commonly attached by applying hot melt, epoxy or liquid adhesive.

Recommended Applications:
  • Alternative to pressure sensitive adhesives
Design Flexibility

3M™ Dual Lock™ Reclosable Fastener SJ3441 consists of interlocking mushroom-shaped heads that easily slide over each other, allowing for positioning of parts before being snapped together. This fastening process creates a durable attachment and provides fast product assembly with great design flexibility. 3M reclosable fasteners can also engage with different stem densities for varying levels of strength and system performance.

3M™ Dual Lock™ Reclosable Fasteners sound an audible snap when secure, which verifies closure of the attachment. To disengage, simply peel the pieces apart by hand. 3M fasteners maintain their strength throughout multiple attachments and detachments. A lightweight alternative to metal fasteners, this product remains hidden beneath surfaces and does not interfere with the integrity of your material—providing aesthetic improvements and design flexibility.

Hundreds of Reattachments in a Snap

When two pieces of 3M™ Dual Lock™ Reclosable Fasteners mate, the stems flex and the mushroom heads slide past each other. After passing the opposing mating piece, the stems snap back into their original position and the opposing mushroom heads interlock. These fasteners can provide high tensile strength but can be opened by simply cleaving or peeling open the closure. This product is well suited for many indoor applications where a good performance, high strength, reclosable fastening system is required.

Delivers Long-Lasting Performance

Not all design requirements are easily satisfied, but you can simplify your attachments. When you need a strong, reliable, yet removable closure, 3M™ Dual Lock™ Reclosable Fasteners are the easy alternative to traditional fastening methods such as screws, nuts or bolts.

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Lead times are estimates and may vary based on our suppliers' product availability.