3M Dual Lock SJ3540 Industrial Mushroom-Shaped Fastener (various variants)

3M™ Dual Lock™ SJ3540 is an advanced reclosable fastening system with black, interlocking mushroom-shaped stems (250 stems per 6.5 cm²), which provides five times the tensile strength of traditional hook-and-loop fasteners. With the ability to be opened and closed up to a thousand times without significant loss of holding power, it is ideal for durable yet detachable internal connections. The strong self-adhesive allows for quick and secure attachment to many plastics, metals, and powder-coated surfaces, eliminating the need for screws, rivets, or nails.

Technical specification:

• Model: 3M™ Dual Lock™ SJ3540
• Color: black
• Width: 25 mm
• Lengths: 45.7 m, 5 m
• Overall thickness: 5.7 mm
• Fastener type: mushroom stem system (250 stems / 6.5 cm²)
• Adhesive type: self-adhesive for internal applications
• Temperature resistance: up to 49°C
• Durability: up to 1000 cycles before 50% loss of holding power

Application:

• Mounting panels, covers, decorative elements
• Attaching service and maintenance components
• Replacing screws, rivets, snaps, and nails
• Projects requiring easy disassembly and reassembly
• Attaching plastic, metal, and powder-coated elements

Benefits and properties:

✅ Strong reclosable fastening – five times more durable than hook-and-loop fasteners
✅ Reusable – up to 1000 open and close cycles
✅ Quick installation – self-adhesive provides immediate grip
✅ Universal application – plastics, metals, powder coatings
✅ Vibration reduction – stable and secure connection