3M Dual Lock Reclosable Fastener SJ3540, Black, 1/2" x 50 yd, Type 250, 4/Case

3M™ Dual Lock™ Reclosable Fastener SJ3540 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) which bonds to a variety of substrates including many plastics and low surface energy materials.
FEATURES:

• 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
• Synthetic rubber-based adhesive bonds well to a variety of substrates including low surface energy plastics such as polyethylene and polypropylene
• 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 120°F (49°C)