3M™ Dual Lock™ reclosable fasteners are comprised of a continuous thick film backing with stems protruding from one side of the backing. The self supporting flexible stems have mushroom shaped heads. The base film, the stems and mushroom heads are manufactured from black polyolefin materials. 3M™ Dual Lock™ reclosable fastener SJ3552CF is a type 170, 3M™ Dual Lock™ reclosable fastener SJ3550CF is a type 250 and 3M™ Dual Lock™ reclosable fastener SJ3552CF is a type 400. The type refers to the approximate number of stems per sq-in.

Dual Lock™, 7000001982, Reclosable Fastener, General Purpose, 50 yd Length, 1 in Width, 0.23 in THK Engaged, Black, Acrylic Adhesive, Polypropylene Backing, 200 deg F Maximum Operating, 250 sq-in Stem Density, Specifications Met: ASTM E-162/E-595/E-662/G21

• Black, interlocking mushroom shaped heads (250 stem density/sq-in) 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
• White, acrylic, conformable foam tape bonds well to a variety of substrates including metals and plastics such as acrylics, polycarbonate and ABS
• 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
• Best suited for indoor and outdoor use

• https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/3M_021200_46242_Catalog.pdf https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/3M_021200_46242_Catalog.pdf
• https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/Dual_Lock_048011_57922_Specification_Sheet.pdf https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/Dual_Lock_048011_57922_Specification_Sheet.pdf