3M SJ3870 Dual Lock Reclosable Fastener 25mm × 250mm

High-Performance Reclosable Fastening Solution

The 3M SJ3870 Dual Lock Reclosable Fastener provides a heavy-duty, hidden fastening solution that replaces traditional screws, bolts, and rivets. This 25mm x 250mm strip features a black polypropylene carrier with Type 250 stem density, offering a slim 6.1 mm engaged thickness. Designed for durability, it maintains 50% of its original tensile strength even after 1,000 opening and closing cycles.

Advanced Interlocking Technology

This fastener utilizes mushroom-shaped heads that slide past each other before snapping together. This "snap" provides an audible cue that the connection is secure. With five times the tensile strength of standard hook-and-loop products, the Type 250 stems can mate with Type 170, 250, or 400 densities, allowing for adjustable closure strength based on your specific application requirements.

Versatile Adhesive and Industrial Applications

Equipped with a modified acrylic adhesive, the SJ3870 bonds effectively to a variety of substrates, including plastics (polyethylene, acrylic, polycarbonate, and ABS) and powder-coated paints. It is an ideal choice for transportation, electronics, medical equipment, and display exhibits. The adhesive performs reliably in both indoor and outdoor settings, resisting temperatures up to 82 degrees Celsius while helping to reduce vibration and noise.

Technical Specifications

• Dimensions: 25mm x 250mm
• Engaged Thickness: 6.1 mm
• Stem Density: Type 250 (mates with 170, 250, and 400)
• Temperature Resistance: Up to 82 degrees Celsius
• Cycle Life: 1,000 closures
• Adhesive Type: Modified Acrylic