Professional-grade reclosable fastener with interlocking mushroom heads providing up to 5X tensile strength. Black modified acrylic foam tape bonds to metals, plastics, and painted surfaces. Ideal for access panels, graphic attachment, and industrial fastening with 1000+ reusable closures.
The 3M™ Dual Lock™ Reclosable Fastener SJ3872 is a professional-grade fastening solution designed as a convenient alternative to traditional fastening methods such as screws, nuts, and bolts. Featuring interlocking mushroom-shaped heads with 170 stem density per square inch, this fastener provides up to 5X the tensile strength of typical hook-and-loop products. The black, modified acrylic foam tape bonds securely to a variety of substrates including metals, powder-coated paints, and plastics such as acrylics, polycarbonate, and ABS. With an engaged thickness of 0.24 inches and a maximum operating temperature of 180°F (82°C), this fastener delivers exceptional performance for industrial applications.
Designed with exceptional durability and versatility, the 3M™ Dual Lock™ Reclosable Fastener SJ3872 can be opened and closed multiple times without losing its holding strength. The fastener produces an audible snap when secure, verifying proper closure, and can be easily disengaged by hand without requiring any tools. The protected foam tape features a removable film liner and is resistant to chemicals and UV exposure. This product is ideal for access panels, graphic attachment, general industrial attachment, and small component fastening. Each case contains 2 rolls, each measuring 45 yards in length and 0.75 inches in width, providing ample material for various industrial projects.
The 3M™ Dual Lock™ Reclosable Fastener SJ3872 offers design flexibility by allowing positioning of parts before being snapped together. Its lightweight construction provides aesthetic improvements while remaining hidden beneath surfaces without interfering with material integrity. With a closure life of 1000 attachments and detachments, this fastener maintains consistent performance throughout its service life. Suitable for both indoor and outdoor applications, it eliminates the need for drilling, screwing, or sewing tools, making installation quick and efficient. This industrial-grade product is intended for trained occupational users and professional applications only.
Key Features
- Interlocking mushroom-shaped heads with 170 stem density per square inch provide up to 5X tensile strength compared to traditional hook-and-loop fasteners
- Black modified acrylic foam tape with excellent conformability bonds securely to metals, powder-coated paints, acrylics, polycarbonate, and ABS plastics
- Audible snap verification confirms secure closure and proper engagement of fastening system
- Reusable closure design allows 1000+ open and close cycles without loss of holding strength or performance degradation
- Chemical and UV resistant foam tape protects against environmental exposure and maintains durability in indoor and outdoor applications
- No drilling, screwing, or sewing tools required for quick and efficient installation without material damage
- Maximum operating temperature of 180°F (82°C) with excellent temperature resistance for demanding industrial environments
- Compatible with Type 250 and Type 400 stem densities for customizable strength combinations based on application requirements
Technical Specifications
| Specification |
Value |
| Product Name | 3M Dual Lock Reclosable Fastener SJ3872 |
| Part Number | SJ3872 |
| 3M Product Number | SJ3872 |
| 3M ID | 7000049615 |
| UPC Code | 00051111974292 |
| Product Color | Black |
| Product Form | Roll |
| Overall Width (Imperial) | 0.75 in |
| Overall Width (Metric) | 19.05 mm |
| Overall Length (Imperial) | 45 yd |
| Overall Length (Metric) | 41.14 m |
| Engaged Thickness (Imperial) | 0.24 in |
| Engaged Thickness (Metric) | 6.1 mm |
| Stem Density | 170 stems per square inch |
| Adhesive Type | Modified Acrylic |
| Primary Liner | Red Polyethylene |
| Primary Liner Color | Red |
| Primary Liner Thickness (Imperial) | 5 mil |
| Primary Liner Thickness (Metric) | 0.13 mm |
| Maximum Operating Temperature (Fahrenheit) | 180°F |
| Maximum Operating Temperature (Celsius) | 82°C |
| Closure Life Cycles | 1000 |
| Flame Retardant | No |
| Indoor/Outdoor Use | Both Indoor and Outdoor |
| Units per Case | 2 rolls |
| Smallest Saleable Unit | Roll |
| Brand | 3M Dual Lock |
| Tensile Strength | Up to 5X stronger than typical hook-and-loop products |
| Compatible Densities | Type 170, mates with Type 250 and Type 400 |
| Chemical Resistance | Yes |
| UV Resistance | Yes |
| Recommended Applications | Access panels, graphic attachment, general industrial attachment, small components |
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