3M™ Dual Lock™ Reclosable Fastener SJ3443 400 Black, 6 in x 50 yd, 1 per case

Unique mushroom-shaped heads snap shut and stay locked Solve Attachment Challenges in an Instant Designed to mate with Type 170 or 250, the mushroom-shaped heads on the 3M™ Dual Lock™ Reclosable Fastener SJ3443 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 SJ3443 is a "Type 400," which means its surface has approximately 400 stems per square inch. Stems and heads are manufactured from a 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 Fasteners such as SJ3444 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.