3M™ Dual Lock™ Reclosable Fastener SJ3444 is up to five times stronger in tensile strength than hook-and-loop fasteners. As tough, polyolefin mushroom-shaped stems snap together, they provide both tensile strength to replace traditional fasteners and a cleaner looking result. These remarkable fasteners can be opened and closed up to 1000 times, before losing 50% of its original tensile strength.
Snap-in-place installation replaces screws and nails, snaps, and rivets
Reclosable system is up to five times stronger in tensile strength than typical hook-and-loop fasteners
Backed with a unique felt-like non-woven fabric for use with hot melt or liquid adhesives
Fastener is hidden when closed and provides clean, smooth appearance
Ideal for indoor and outdoor use to attach doors, access panels, cushions, headliners, signs and display components
Solve Attachment Challenges in an Instant
Designed to engage with either Type 250 or Type 400 systems, the mushroom-shaped stems on the 3M™ Dual Lock™ Reclosable Fastener SJ3444 easily slide over each other, allowing for positioning of parts, before they are snapped together to create a firm fastening attachment. When mated, the fasteners are hidden from view and leave an unbroken surface to help create a smooth, clean appearance.
Select the right Fastener for the Job
3M™ Dual Lock™ Reclosable Fastener SJ3444 is a "Type 170," which means its surface has approximately 170 stems per square inch. Stems and heads are manufactured from polyolefin and the backing is made of a unique felt-like non-woven fabric. For use with a variety of hot melt or liquid adhesives, it can be bonded to wood, foam, fabric or similar materials. This construction allows for better contact with surfaces having slight texturing or surface irregularities.To gain various levels of holding power, this fastener should be mated with different 3M Dual Lock Reclosable Fastener types, such as SJ3443 or SJ3445. 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
How it works:
When two pieces of 3M™ Dual Lock™ Reclosable Fasteners (PDF, 910 Kb) 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 position, interlocking with the opposing heads. The audible snap signals 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, vehicle ceiling panels, furniture seats and backs, marine carpeting, and orthopedic brace closures.
Today, designers, manufacturers, and consumers expect more options to secure, attach and connect surfaces. 3M Dual Lock Reclosable Fasteners offer rapid 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 these innovative fasteners a popular and effective solution.