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3M™ Dual Lock™ Reclosable Fastener SJ3440, Black, 1 in x 50 yd, Type 250, 2 Roll/Case

Dual Lock™

$300.70 / Roll

SKU 7000001979
Legacy SKU 70070521029
UPC 00021200658082
Catalog Number SJ3440
Product Number SJ3440

3M Dual Lock Reclosable Fastener SJ3440 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 (250 stem density per square inch) provide strong, reliable and durable fastening that can be opened and closed multiple times
  • Mates with Type 170, Type 250 or Type 400 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
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On it's way to you May 14   

Qty

Minimum Order 2 Rolls
Order Increment 2 Rolls
  Multiple Application Use
  Versatile
  Easy To Use
  Fantastic Price
Product Dimensions
 Imperial Metric
Weight 0 NULL
Width 0 null
Length 0 null
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Shipping Dimensions
Weight 5.94984 lb
Length 20.98425 in
Width 20.98425 in
Height 2.79528 in
Color Black

PRODUCT FAQ

  1. What is the 3M™ Dual Lock™ Reclosable Fastener SJ3440?

    The 3M™ Dual Lock™ Reclosable Fastener SJ3440 is a type of fastener that allows for repeated attachment and detachment. It uses interlocking mushroom-shaped heads to achieve a secure, yet easily removable bond.

  2. What are the dimensions and color options available for this product?

    This specific product comes in black and measures 1 inch x 50 yards.

  3. What is Type 250 mean on the specification sheet?

    Type refers to the configuration or density of interlocking features per square inch. A higher type number generally means there are more stems per square inch, which can provide a stronger hold.

  4. How many dual locks come in one package/case?

    Two rolls/pieces of SJ3440 Dual Locks come in each case ordered from us at 3M!

  5. What are some common applications for this reclosable fastening system?

    The possibilities vary! Some popular applications include attaching vehicle roof racks, securing door panels or signs, and packaging or pop up displays accessories!

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 SJ3440 has exceptional strength through its interlocking mushroom-shaped heads (250 stem density per square inch). With 3M™ Dual Lock™ Reclosable Fastener SJ3440, 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 SJ3440 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. 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. These 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.

Applications
Industries
Brochures, Catalogs & Data Sheets
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Other Products in this Family

  1. $150.35

    3M™ Dual Lock™ Reclosable Fastener Black
    1/2 in x 50 yd
    Type 250
    4 Roll/Case
    Ships June 14

  2. $601.38

    3M™ Dual Lock™ Reclosable Fastener Black
    2 in x 50 yd
    Type 250
    1 Roll/Case
    Ships June 14

  3. $1,804.15

    3M™ Dual Lock™ Reclosable Fastener Black
    6 in x 50 yd
    Type 250
    1 Roll/Case
    Ships June 14

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