Premium reclosable mushroom-head fastener with 170 stem density, 1000+ closure cycles, 5X stronger than hook-and-loop, suitable for industrial automotive and construction applications.
The 3M™ Dual Lock™ Reclosable Fastener SJ3552 is an innovative industrial fastening solution featuring interlocking mushroom-shaped heads with 170 stem density per square inch. This premium reclosable fastener delivers exceptional strength through its unique design, providing up to 5X the tensile strength of typical hook-and-loop products. The fastener can be opened and closed up to 1,000 times before losing 50% of its original strength, making it ideal for repeated access and repositioning applications. The white acrylic conformable foam tape bonds securely to a variety of substrates including metals and plastics such as acrylics, polycarbonate, and ABS, with excellent heat, chemical, and UV resistance.
This Type 170 fastener comes in a convenient 2 roll per case package, with each roll measuring 1 inch wide by 50 yards long and featuring a removable film liner for easy application. The mushroom heads easily slide over each other, allowing for precise positioning of parts before being snapped together to create a firm fastening attachment. When mated, the fasteners are hidden from view, leaving an unbroken surface for a smooth, clean aesthetic appearance. The fastener produces an audible snap when secure, verifying proper closure, and can be easily disengaged by simply peeling the pieces apart by hand.
Designed as a lightweight alternative to metal fasteners, screws, bolts, and nuts, the 3M Dual Lock SJ3552 offers superior design flexibility and fast product assembly without requiring drilling, screwing, or sewing tools. With a maximum operating temperature of 200°F (93°C), this fastener is well-suited for both indoor and outdoor applications in automotive, construction, electronics, furniture, general industrial, medical, military, packaging, and specialty vehicle industries. It mates seamlessly with Type 250 and Type 400 stem densities to provide customizable strength combinations for varying project requirements.
Key Features
- Interlocking mushroom-shaped heads with 170 stem density per square inch for exceptional strength
- Can be opened and closed up to 1,000 times before losing 50% of original strength
- Provides up to 5X the tensile strength of typical hook-and-loop products
- Audible snap verification when properly secured for closure confirmation
- White acrylic conformable foam tape bonds to metals and plastics including acrylics, polycarbonate, and ABS
- Heat, chemical, and UV resistant with maximum operating temperature of 200°F (93°C)
- Compatible with Type 250 and Type 400 stem densities for customizable strength combinations
- No drilling, screwing, or sewing tools required for quick installation
- Hidden fastener provides smooth, clean aesthetic appearance with unbroken surface
- Suitable for both indoor and outdoor applications across multiple industries
Technical Specifications
| Specification |
Value |
| Product Number | SJ3552 |
| UPC | 00021200862793 |
| 3M ID | 7000001959 |
| Product Form | Roll |
| Overall Width (Imperial) | 1 in |
| Overall Width (Metric) | 25.4 mm |
| Overall Length (Imperial) | 50 yd |
| Overall Length (Metric) | 45.72 m |
| Product Color | Black |
| Adhesive Type | Acrylic |
| Adhesive Color | Black |
| Backing Material | Polyolefin |
| Primary Liner | Clear Polyolefin |
| Primary Liner Color | Transparent |
| Stem Density | 170 per square inch |
| Engaged Thickness (Imperial) | 226 mil |
| Engaged Thickness (Metric) | 5.8 mm |
| Primary Liner Thickness (Imperial) | 4 mil |
| Primary Liner Thickness (Metric) | 0.1 mm |
| Maximum Operating Temperature (Fahrenheit) | 200°F |
| Maximum Operating Temperature (Celsius) | 93°C |
| Closure Life | 1000 cycles |
| Units per Case | 2 rolls |
| Smallest Saleable Unit | Roll |
| Brand | 3M Dual Lock™ |
| Flame Retardant | No |
| Indoor/Outdoor | Indoor/Outdoor |
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