Industrial-grade reclosable fastener with 400 stem density mushroom heads, 5X stronger than hook-and-loop, reusable up to 1,000 times, temperature resistant to 200°F, available in 1/2 inch x 50 yard rolls, 4 rolls per case.
The 3M™ Dual Lock™ Reclosable Fastener SJ3551 represents a revolutionary alternative to traditional fastening methods such as screws, nuts, and bolts. Featuring interlocking mushroom-shaped heads with 400 stem density per square inch, this industrial-grade fastener delivers exceptional strength with up to 5X the tensile strength of typical hook-and-loop products. The black fastener comes in a convenient roll format measuring 1/2 inch wide by 50 yards long, with 4 rolls per case, making it ideal for high-volume industrial applications.
This reclosable fastening system can be opened and closed up to 1,000 times before losing 50% of its original strength, providing unparalleled durability for repeated access and repositioning requirements. The white acrylic conformable foam tape with a removable film liner creates a strong, pressure-sensitive bond that is resistant to heat, chemicals, and UV exposure. Installation is quick and tool-free—no drilling, screwing, or sewing required—making it perfect for rapid assembly and design flexibility. The audible snap verification upon closure ensures secure attachment, while the hidden fastener design maintains an unbroken, aesthetically pleasing surface.
The SJ3551 is engineered for both indoor and outdoor use with excellent temperature resistance up to 200°F (93°C). It mates seamlessly with Type 170 and Type 250 stem densities to provide customizable strength combinations for varying project requirements. Ideal applications include access panels, graphic attachment, specialty vehicle interior attachments, general industrial fastening, and small component assembly. This industrial-only product is designed for trained occupational users and is not intended for consumer sale or personal use.
Key Features
- Interlocking mushroom-shaped heads with 400 stem density per square inch provide up to 5X tensile strength of traditional hook-and-loop fasteners
- Reusable up to 1,000 times before losing 50% of original strength for repeated access and repositioning
- Audible snap verification upon closure ensures secure attachment without additional tools or fasteners
- Heat, chemical, and UV resistant with maximum operating temperature of 200°F (93°C) for indoor and outdoor applications
- Compatible with Type 170 and Type 250 stem densities for customizable strength combinations
- Quick tool-free installation with no drilling, screwing, or sewing required
- Hidden fastener design maintains smooth, unbroken aesthetic appearance
- White acrylic conformable foam tape bonds to metals and plastics including acrylics, polycarbonate, and ABS
- Removable film liner for easy application and storage
- Industrial-grade performance for access panels, graphic attachment, specialty vehicles, and general assembly
Technical Specifications
| Specification |
Value |
| Product Name | 3M Dual Lock Reclosable Fastener SJ3551 |
| Part Number | SJ3551 |
| 3M Product Number | SJ3551 |
| 3M ID | 7000051898 |
| UPC | 00021200863561 |
| Product Color | Black |
| Adhesive Color | Black |
| Adhesive Type | General Purpose Acrylic Adhesive |
| Product Form | Roll |
| Overall Width (Imperial) | 0.5 in |
| Overall Width (Metric) | 12.7 mm |
| Overall Length (Imperial) | 50 yd |
| Overall Length (Metric) | 45.72 m |
| Engaged Thickness (Imperial) | 0.23 in |
| Engaged Thickness (Metric) | 5.8 mm |
| Stem Density | 400 per square inch |
| Type Classification | Type 400 |
| Maximum Operating Temperature (Fahrenheit) | 200°F |
| Maximum Operating Temperature (Celsius) | 93°C |
| Closure Life | 1000 cycles before losing 50% strength |
| Backing Material | Polyolefin |
| Primary Liner | Clear Polyolefin |
| Primary Liner Color | Transparent |
| Primary Liner Thickness (Imperial) | 4 mil |
| Primary Liner Thickness (Metric) | 0.1 mm |
| Units per Case | 4 rolls |
| Smallest Saleable Unit | Roll |
| Indoor/Outdoor Rating | Indoor/Outdoor |
| Flame Retardant | No |
| Compatible Types | Mates with Type 170 and Type 250 stem densities |
| Tensile Strength | Up to 5X stronger than typical hook-and-loop products |
| Brand | 3M Dual Lock |
| Recommended Applications | Access panels, graphic attachment, specialty vehicles, general industrial attachment, small components |
| Substrate Compatibility | Metals and plastics including acrylics, polycarbonate, and ABS |
| Industries | Appliance, Automotive, Construction, Electronics, Furniture, General Industrial, MRO, Medical, Military & Government, Packaging, Retail, Specialty Vehicles, Transportation |
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