Professional-grade reclosable fastening system with 250 stem density mushroom heads, 1000 cycle closure life, non-adhesive backing, and audible snap verification for secure industrial applications.
The 3M™ Dual Lock™ Reclosable Fastener SJ3440 is an innovative industrial fastening solution that provides a durable, reusable alternative to traditional screws, nuts, and bolts. Featuring interlocking mushroom-shaped heads with 250 stem density per square inch, this black fastener delivers exceptional strength and reliability while allowing for multiple open and close cycles. The non-adhesive backing is designed for attachment using hot melt, epoxy, or liquid adhesives, making it highly versatile for various industrial applications.
This reclosable fastener system offers outstanding design flexibility with its ability to mate with Type 170, Type 250, or Type 400 stem densities, allowing customization of strength combinations to meet specific project requirements. The fastener provides an audible snap when securely engaged, giving users immediate verification of proper closure. With a maximum operating temperature of 200°F (93°C) and an impressive closure life of 1000 cycles, the SJ3440 maintains its strength and performance throughout extensive use.
The 3M Dual Lock SJ3440 comes in a convenient roll format measuring 0.5 inches wide by 50 yards long, with 4 rolls per case for bulk purchasing. Its non-intrusive design remains hidden beneath surfaces, providing aesthetic improvements while maintaining material integrity. This product is ideal for applications including graphics attachment, kiosk assembly, panel attachment systems, and sensor attachment across construction, electronics, furniture, medical, and transportation industries.
Key Features
- Interlocking mushroom-shaped heads with 250 stem density per square inch for exceptional holding strength
- Reclosable design allows hundreds of reattachments with audible snap verification of secure closure
- Non-adhesive backing compatible with hot melt, epoxy, and liquid adhesives for flexible installation
- Compatible with Type 170, 250, and 400 stem densities for customizable strength combinations
- Temperature resistant up to 200°F (93°C) with 1000 cycle closure life for long-lasting performance
- Hidden fastener provides smooth aesthetic appearance without drilling or mechanical fastening
- Suitable for indoor and outdoor industrial applications across multiple industries
Technical Specifications
| Specification |
Value |
| Product Name | 3M Dual Lock Reclosable Fastener SJ3440 |
| Part Number | SJ3440 |
| 3M Product Number | SJ3440 |
| 3M ID | 7010315781 |
| UPC Code | 00021200658075 |
| Product Color | Black |
| 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) | 0.16 in |
| Engaged Thickness (Metric) | 4.1 mm |
| Stem Density | 250 per square inch |
| Adhesive Type | Non-adhesive |
| Backing Material | Polyolefin |
| Maximum Operating Temperature (Fahrenheit) | 200°F |
| Maximum Operating Temperature (Celsius) | 93°C |
| Closure Life | 1000 cycles |
| Units per Case | 4 rolls |
| Smallest Saleable Unit | Roll |
| Flame Retardant | No |
| Brand | 3M Dual Lock |
| Recommended Applications | Attaching Graphics, Kiosk Assembly, Panel Attachment Systems, Sensor Attachment |
| Compatible Industries | Construction, Electronics, Furniture, General Industrial, MRO, Medical, Military & Government, Packaging, Retail, Specialty Vehicles, Transportation |
Order 3M Dual Lock Reclosable Fastener SJ3440 Black 1/2 inch at wholesale prices for companies and factories in Iraq and Middle East, get the best deals on bulk purchases, contact us today.
