3M™ Dual Lock™ Reclosable Fastener SJ3871, Black, 1 in x 5 yd, Sample

The 3M™ Dual Lock™ Reclosable Fastener SJ3871 has a modified acrylic adhesive on the back of a black polypropylene reclosable fastener. This product can be used both indoors and outside in a variety of applications; and has a slim 0.24” engaged thickness and long service life.
Special Price $53.51 Regular Price $62.95
UPC 00051131184886
3M ID 7100226386
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The remarkable 3M™ Dual Lock™ Reclosable Fastener SJ3871 can be opened and closed over and over, up to 1,000 times before losing 50% of the original strength for repeated access or repositioning. The mushroom heads easily slide over each other allowing positioning of parts before they are snapped together to create a firm fastening attachment. When mated the fasteners are hidden from view and leave you with an unbroken surface to help create a smooth, clean appearance. The type 400 stem density polyolefin fastener mates to type 170 or 250 giving the user the option of different closure strength depending upon application.

Recommended Applications

General industrial Transportation Specialty vehicle Medical Military Packaging Point of purchase displays Exhibits Electronics Construction Furniture

Maintenance repair and operations (MRO)

This fastener is backed by a modified acrylic adhesive that bonds to many plastics (polyethylene, acrylic, polycarbonate and ABS), powder coated paints and medium to low surface energy materials with little or no surface preparation.

Hear the Snap

"Snap!" it's the one word that best defines the extensive line of 3M™ Dual Lock™ Reclosable Fastener products. Here's how it works: When two pieces of 3M Dual Lock Reclosable Fastener are pressed together, the stems flex and the mushroom heads slide past each other. After passing the mushroom heads on the opposing mating piece, a stem snaps up into its original position, interlocking with the opposing heads. Listen for the audible snap to signal that the fastener is engaged. The attachment formed may be as effective as screws or rivets, but will peel apart for repositioning. 3M Dual Lock Reclosable Fasteners are used extensively in transportation, electronics, business equipment, machinery, medical and sign and display markets.

Lose the Screws

The bond is strong but can easily be detached; just pull apart to disengage and reattach as needed. This means that this product gives you a strong, hidden closure with the convenience of multiple openings and closings so you can lose the screws, rivets, hooks, bolts, zippers and other unsightly attachment methods. In short – this product is an aesthetically pleasing fastener that doesn't sacrifice attachment strength; in fact, the 3M™ Dual Lock™ Reclosable Fastener SJ3871 is about five times stronger in tensile strength than 3M Hook and Loop fasteners used in comparable applications. In many cases, this attachment method also saves the user money with less material used. Additionally, there's no need to drill holes that might weaken the part or substrate, and no tools required to assemble or remove the part.

You expect more options to secure, attach and connect surfaces. 3M Dual Lock Reclosable Fasteners offer quick installation and high-strength attachment, yet can be opened as easily as zippers. That functional flexibility, as well as superior aesthetics, reduced weight, and savings in labor and installation costs, make innovative 3M fasteners a popular and effective solution.


  • Reclosable system is up to five times stronger than hook-and-loop fasteners
  • Snap-in-place installation replaces screws, nails, snaps and rivets
  • Black fastener is hidden when closed, providing a clean, smooth appearance
  • Modified acrylic adhesive bonds to many plastics, powder coated paints and medium to low surface energy materials with little or no surface preparation
  • Type 400 stem density polyolefin fastener mates to type 170 or 250
  • Ideal for indoor and outdoor use to attach doors, flexible solar panels, headliners, access panels, signs and display components
  • Medium temperature resistance – up to 140°F (60°C)
More Information
3M ID 7100226386
Keywords 3M, Dual Lock Reclosable Fastener, SJ3871, reclosable fastener, modified acrylic adhesive, polypropylene fastener, indoor fastener, outdoor fastener, hook-and-loop alternative, snap-in-place installation, black fastener, clean appearance fastener, stem density fastener, polyolefin fastener, medium temperature resistance, automotive fastener, commercial solutions, electronics fastener, medical fastener, packaging fastener, display fastener, construction fastener, furniture fastener, MRO fastener, bonding and assembly, low surface energy materials, adhesive fastener, specialty vehicle fastener, high-strength attachment, reusable fastener, versatile fastener, maintenance repair, reliable fastener, easy installation fastener, detachable fastener, hidden fastening, 3M fastener solutions.
Global Product Hierarchy Tapes > Reclosable Fasteners > Mushroom Hook Fasteners
Application Interior Mirror & Fixture Attachment, Trim & Molding Attachment, Wall & Door Panel Attachment
Color Family Black
Product Color Black
Product Number SJ3871
Product Type simple
Quantity 0
Trademark 1 3M™
Trademark 2 Dual Lock™
Country of Origin United States
SAP Shelf Life In Days 730
Base - Billing Unit ROL
Base - Metric Gross Weight 249.476 G
Base - Metric Height Dimension 3.175 CM
Base - Metric Length Dimension 36.83 CM
Base - Metric Width Dimension 24.13 CM
Base - Item Quantity 1
Base - Unit ROL
Consumer - Billing Unit ROL
Consumer - Customary Cubic Dimension 172.18752547741315 ci
Consumer - Customary Gross Weight 0.5500004332083452 lbs
Consumer - Customary Net Weight 0.5400002649956391 lbs
Consumer - Customary Height Dimension 1.25 in
Consumer - Customary Length Dimension 14.5 in
Consumer - Customary Width Dimension 9.5 in
Consumer - Metric Cubic Dimension 2821.648 CCM
Consumer - Metric Net Weight 244.94 G
Consumer - Metric Height Dimension 3.175 CM
Consumer - Metric Length Dimension 36.83 CM
Consumer - Metric Width Dimension 24.13 CM
Consumer - Item Quantity 1
Consumer - Total Unit Quantity 1
Consumer - Previous Packaging Level Quantity 1
Consumer - Item Unit RLS
Consumer - Unit ROL
Pallet - Previous Packaging Level Unit LOOS
Pallet - Pallet Layer Quantity 1
Pallet - Shipping Container Per Layer Quantity 999
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