Professional-grade reclosable fastener with interlocking mushroom heads, 250 stem density, offering 5X stronger tensile strength than hook-and-loop alternatives. Delivers audible snap closure, supports 1000+ reattachments, and bonds to metals, glass, and plastics. Ideal for automotive, industrial, and construction applications.
The 3M™ Dual Lock™ Reclosable Fastener SJ3550CF is a revolutionary alternative to traditional fastening methods such as screws, nuts, and bolts. Featuring interlocking mushroom-shaped heads with 250 stem density per square inch, this fastener delivers exceptional strength with up to 5X the tensile strength of typical hook-and-loop products. The product comes in a convenient 2 inch by 50 yard roll format with a black adhesive appearance and clear acrylic tape backing protected by a removable film liner. This pressure-sensitive fastening system bonds securely to a variety of substrates including metals, glass, and plastics such as acrylics, polycarbonate, and ABS, making it ideal for diverse industrial applications.
Designed for quick and easy installation without the need for drilling, screwing, or sewing tools, the 3M Dual Lock Reclosable Fastener SJ3550CF provides design flexibility and fast product assembly. The fastener features an audible snap when secure, verifying closure and providing user confirmation. With the ability to withstand up to 1000 closure cycles, this product maintains its strength throughout multiple attachments and detachments, making it a durable and long-lasting solution. The mushroom-shaped heads easily slide over each other, allowing for positioning of parts before being snapped together, and can be easily disengaged by simply peeling the pieces apart by hand.
With excellent temperature resistance up to 220°F (104°C) and suitability for both indoor and outdoor applications, the 3M Dual Lock Reclosable Fastener SJ3550CF is well-suited for numerous industries including automotive, construction, electronics, furniture, medical, military and government, packaging, retail, and specialty vehicles. Recommended applications include access panels, graphic attachment, specialty vehicle interior attachments, general industrial attachment, dashboard attachment, drone accessory attachment, mounting boat accessories, mounting RV accessories, and mounting surveillance cameras. This innovative fastening solution provides aesthetic improvements while remaining hidden beneath surfaces and does not interfere with material integrity.
Key Features
- Interlocking mushroom-shaped heads with 250 stem density per square inch for superior strength
- Up to 5X stronger tensile strength compared to typical hook-and-loop fastening products
- Audible snap verification when closure is secured for user confirmation
- Supports 1000+ closure cycles maintaining strength through multiple attachments and detachments
- Clear acrylic pressure-sensitive adhesive bonds to metals, glass, acrylics, polycarbonate, and ABS
- Temperature resistant up to 220°F (104°C) for indoor and outdoor applications
- Quick installation without drilling, screwing, or sewing tools required
- Design flexibility with easy hand-peeling disengagement for repositioning
- Compatible with Type 170, Type 250, and Type 400 stem densities for customized strength combinations
- Hidden fastener provides aesthetic appearance without interfering with material integrity
Technical Specifications
| Specification |
Value |
| Product Number | SJ3550CF |
| Part Number | SJ3550 |
| UPC Code | 00021200317668 |
| 3M ID | 7010415765 |
| Overall Width (Imperial) | 2 in |
| Overall Width (Metric) | 50.8 mm |
| Overall Length (Imperial) | 50 yd |
| Overall Length (Metric) | 45.7 m |
| Product Form | Roll |
| Roll Goods Type | Rigid Back |
| Backing Material | Polyolefin |
| Primary Liner | Clear Polyolefin |
| Primary Liner Color | Transparent |
| Adhesive Color | Black |
| Stem Density | 250 per square inch |
| Engaged Thickness (Imperial) | 226 mil |
| Engaged Thickness (Metric) | 5.74 mm |
| Unmated Thickness (Metric) | 3.5 mm |
| Primary Liner Thickness (Imperial) | 0.08 mm |
| Primary Liner Thickness (Metric) | 0.1 mm |
| Maximum Operating Temperature (Fahrenheit) | 200°F |
| Maximum Operating Temperature (Celsius) | 93°C |
| Temperature Resistance Peak | 220°F (104°C) |
| Closure Life Cycles | 1000 |
| Units per Case | 1 Roll |
| Smallest Saleable Unit | Roll |
| Product Type | Fastener |
| Brand | 3M Dual Lock |
| Flame Retardant | No |
| Indoor/Outdoor Rating | Indoor/Outdoor |
| Good For Outdoors | Yes |
| Compatible Stem Densities | Type 170, Type 250, Type 400 |
| Tensile Strength Advantage | 5X stronger than hook-and-loop products |
| Installation Method | Pressure-sensitive adhesive, no tools required |
| Disengagement Method | Hand peel or cleave |
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