3M™ Dual Lock™ Reclosable Fastener SJ3540 gives you up to five times the strength of hook-and-loop fasteners. As tough, polyolefin mushroom-shaped stems snap together, they provide both the tensile strength to replace traditional fasteners and a cleaner looking result.
Reclosable system is up to five times stronger than hook-and-loop fasteners
Snap-in-place installation replaces screws and nails, snaps, and rivets
Black fastener is hidden when closed and provides clean, smooth appearance
Synthetic rubber adhesive bonds well to metals, glass, paint, and many low surface energy plastics
Ideal for indoor use to attach doors, access panels, signs and display components
3M™ Dual Lock™ Reclosable Fastener SJ3540 250 Black, 3/4 in x 50 yd 0.23 in (5.8 mm), 2 per case Bulk
50 Linear Yard
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Our remarkable fasteners can be opened and closed over and over, up to 1000 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 black fasteners are hidden from view and leave you with an unbroken surface to help create a smooth, clean appearance. We use a pressure-sensitive, synthetic rubber adhesive to provide a quick grab for indoor applications that adheres well to metal, glass, plastics, and powder-coated surfaces.
3M(TM) Dual Lock™ SJ3540 Reclosable Fastener is a "Type 250," which means its surface has approximately 250 stems per square inch with a 0.23 inch engaged thickness. We manufacture the stems and heads from black polypropylene and the backing is made with a synthetic rubber based adhesive on a 37 mils conformable polyolefin foam backing protected by a removable liner. This construction allows for better contact with surfaces having slight texturing or surface irregularities.
To gain various levels of holding power, this fastener can be mated with different Dual Lock™ Reclosable Fastener types. Suggested combinations of mated fasteners are:
Type 250 to Type 170
Type 250 to Type 250
Type 170 to Type 400
Type 250 to Type 400
For a quick grab attachment with high strength but limited cycle life any of our 3M Dual Lock reclosable fastener products can be mated with 3M™ Hook and Loop Reclosable Fasteners.
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. Applications include attaching signs, enclosure panels, banners, repositionable shelving, furniture seats and backs, and orthopedic brace closures.
Today, you expect more options to secure, attach and connect surfaces. 3M Dual Lock Reclosable Fasteners offer instant 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 our innovative fasteners a popular and effective solution.