Industrial-grade reclosable fastener with 250 stem density mushroom heads, 5X stronger than hook-and-loop, bonds to metals, glass, and plastics with audible snap verification and 1000+ reattachments.
The 3M™ Dual Lock™ Reclosable Fastener SJ3550CF is a premium industrial fastening solution featuring interlocking mushroom-shaped heads with 250 stem density per square inch. This innovative product delivers up to 5X the tensile strength of typical hook-and-loop fasteners, making it an ideal alternative to traditional screws, nuts, and bolts. The fastener comes with a clear acrylic tape protected by a removable film liner, providing exceptional adhesion to a wide variety of substrates including metals, glass, and plastics such as acrylics, polycarbonate, and ABS.
Designed for both indoor and outdoor applications, the 3M™ Dual Lock™ Reclosable Fastener SJ3550CF offers outstanding durability with heat, chemical, and UV resistance. The product features an audible snap when secure, verifying closure of the attachment, and can be easily disengaged by simply peeling the pieces apart by hand. With the ability to withstand hundreds of reattachments without losing strength, this fastener maintains its performance throughout multiple attachment and detachment cycles.
This reclosable fastening system is ideal for access panels, graphic attachment, specialty vehicle interior attachments, and general industrial applications. The 2 roll per case package, with each roll measuring 1 inch wide by 50 yards long, provides ample material for comprehensive project coverage. The black appearance of the fastener ensures aesthetic appeal while remaining hidden beneath surfaces, providing design flexibility without compromising material integrity.
Key Features
- Interlocking mushroom-shaped heads with 250 stem density provide exceptional strength and durability
- Up to 5X stronger tensile strength compared to traditional hook-and-loop fasteners
- Compatible with Type 170, Type 250, and Type 400 stem densities for customized strength combinations
- Audible snap verification ensures secure closure and proper attachment
- Heat, chemical, and UV resistant for reliable indoor and outdoor performance
- Hundreds of reattachments possible without loss of strength or performance
- Clear acrylic tape with removable film liner for easy installation
- Bonds excellently to metals, glass, acrylics, polycarbonate, and ABS plastics
- No drilling, screwing, or sewing required for quick and simple installation
- Black appearance provides aesthetic appeal while remaining hidden beneath surfaces
Technical Specifications
| Specification |
Value |
| Product Type | Reclosable Fastener |
| Brand | 3M Dual Lock™ |
| Model Number | SJ3550CF |
| Part Number | SJ3550CF |
| UPC | 00021200307720 |
| Product Color | Black |
| Overall Width (Imperial) | 1 inch |
| Overall Width (Metric) | 25.4 mm |
| Overall Length (Imperial) | 50 yards |
| Overall Length (Metric) | 45.7 meters |
| Product Form | Roll |
| Case Quantity | 2 rolls per case |
| Stem Density | 250 stems per square inch |
| Backing Material | Polyolefin |
| Adhesive Color | Black |
| Primary Liner | Clear Polyolefin |
| Engaged Thickness (Imperial) | 226 mil |
| Engaged Thickness (Metric) | 5.74 mm |
| Unmated Thickness (Metric) | 3.5 millimeters |
| Maximum Operating Temperature (Fahrenheit) | 200°F |
| Maximum Operating Temperature (Celsius) | 93°C |
| Closure Life | 1000+ reattachments |
| Indoor/Outdoor | Both |
| Flame Retardant | No |
| Good for Outdoors | Yes |
| Tensile Strength | Up to 5X stronger than hook-and-loop |
| Compatible Types | Type 170, Type 250, Type 400 |
| Compatible Substrates | Metals, glass, acrylics, polycarbonate, ABS plastics |
| Roll Goods Type | Rigid Back |
| Smallest Saleable Unit | Roll |
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