Industrial-grade reclosable fastener with 400 stem density mushroom heads, non-adhesive backing, and 1000+ closure cycles for durable, reusable fastening solutions.
The 3M™ Dual Lock™ Reclosable Fastener SJ3441 is a premium industrial fastening solution designed as an easy and reliable alternative to traditional fastening methods such as screws, nuts, and bolts. This black reclosable fastener features interlocking mushroom-shaped heads with 400 stem density per square inch, providing exceptional strength and durability while allowing multiple open and close cycles. The fastener can be opened and closed hundreds of times, making it an ideal solution for applications requiring frequent assembly and disassembly without compromising performance.
The SJ3441 is engineered with a non-adhesive polyolefin backing that requires attachment using hot melt, epoxy, or liquid adhesives, offering design flexibility and compatibility with various adhesive systems. This fastener is compatible with Type 170 or Type 250 stem densities, allowing customization of strength combinations based on specific project requirements. With an engaged thickness of 0.16 inches (4.1 mm) and a maximum operating temperature of 200°F (93°C), this product delivers reliable performance in both indoor and outdoor applications across multiple industries including construction, electronics, furniture, medical devices, military, and transportation.
The 3M Dual Lock SJ3441 provides an audible snap when secure, verifying closure and ensuring proper attachment. Unlike traditional metal fasteners, this lightweight solution remains hidden beneath surfaces, providing aesthetic improvements while maintaining material integrity. Each roll measures 2 inches wide by 50 yards long, offering substantial coverage for industrial and occupational applications. The product is specifically designed for trained industrial and occupational customers and is not intended for consumer use.
Key Features
- Black interlocking mushroom-shaped heads with 400 stem density per square inch for exceptional strength and reliability
- Non-adhesive polyolefin backing compatible with hot melt, epoxy, and liquid adhesives
- Audible snap verification upon secure closure ensuring proper attachment confirmation
- Supports 1000+ closure cycles maintaining strength through multiple attachments and detachments
- Compatible with Type 170 and Type 250 stem densities for customizable strength combinations
- Maximum operating temperature of 200°F (93°C) with good temperature resistance
- Lightweight alternative to metal fasteners that remains hidden beneath surfaces
- Suitable for indoor and outdoor industrial applications across multiple industries
Technical Specifications
| Specification |
Value |
| Product Number | SJ3441 |
| Part Number | SJ3441 |
| UPC Code | 00021200863684 |
| Product Color | Black |
| Product Form | Roll |
| Overall Width (Imperial) | 2 inches |
| Overall Width (Metric) | 50.8 millimeters |
| Overall Length (Imperial) | 50 yards |
| Overall Length (Metric) | 45.72 meters |
| Engaged Thickness (Imperial) | 0.16 inches |
| Engaged Thickness (Metric) | 4.1 millimeters |
| Stem Density | 400 stems per square inch |
| Adhesive Type | Non-adhesive |
| Backing Material | Polyolefin |
| Closure Life | 1000 cycles |
| Maximum Operating Temperature (Fahrenheit) | 200°F |
| Maximum Operating Temperature (Celsius) | 93°C |
| Flame Retardant | No |
| Units per Case | 1 roll |
| Smallest Saleable Unit | Roll |
| Brand | 3M Dual Lock |
| Compatible Stem Densities | Type 170, Type 250, Type 400 |
| Attachment Method | Hot melt, epoxy, or liquid adhesives |
| Industries | Construction, Electronics, Furniture, General Industrial, MRO, Medical, Military & Government, Packaging, Retail, Specialty Vehicles, Transportation |
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