Professional reclosable fastening solution with 250 stem density mushroom heads, non-adhesive backing, 2 in x 50 yd roll, rated for 1000 closure cycles and 220°F temperature resistance.
The 3M™ Dual Lock™ Reclosable Fastener SJ3440 is a professional-grade fastening solution featuring black interlocking mushroom-shaped heads with 250 stem density per square inch. This innovative fastener provides strong, reliable, and durable fastening that can be opened and closed multiple times without degradation. The product comes as a 2-inch wide roll with 50 yards of material, offering industrial-strength performance in a reusable format.
Designed as an easy and clear alternative to traditional fastening methods such as screws, nuts, and bolts, the SJ3440 delivers exceptional versatility for various applications. The non-adhesive backing allows for attachment using hot melt, epoxy, or liquid adhesives, providing flexibility in installation methods. With its interlocking mushroom-shaped heads, this fastener creates an audible snap when secure, verifying proper closure and providing user confidence in the attachment.
The fastener maintains excellent performance across multiple attachments and detachments, with a closure life rated at 1000 cycles. It features good temperature resistance up to 220°F (104°C) and is well-suited for both indoor and outdoor applications. Compatible with Type 170, Type 250, and Type 400 stem densities, the SJ3440 allows for customized strength combinations based on specific project requirements. This product is ideal for applications including graphics attachment, kiosk assembly, panel attachment systems, and sensor attachment in construction, electronics, furniture, medical, and transportation industries.
Key Features
- Black interlocking mushroom-shaped heads with 250 stem density per square inch for strong, reliable fastening
- Reclosable design allows opening and closing multiple times with audible snap verification
- Non-adhesive backing compatible with hot melt, epoxy, and liquid adhesives for flexible installation
- Rated for 1000 closure cycles maintaining consistent strength throughout attachment and detachment
- Temperature resistant up to 220°F (104°C) suitable for indoor and outdoor applications
- Compatible with Type 170, Type 250, and Type 400 stem densities for customized strength combinations
- Hidden fastener provides smooth aesthetic appearance as alternative to screws and bolts
- No drilling or screwing required for quick and easy assembly
Technical Specifications
| Specification |
Value |
| Product Name | 3M™ Dual Lock™ Reclosable Fastener SJ3440 |
| Part Number | SJ3440 |
| 3M Product Number | SJ3440 |
| 3M ID | 7100136225 |
| UPC | 00021200658099 |
| Product Color | Black |
| Product Form | Roll |
| Overall Width (Imperial) | 2 in |
| Overall Width (Metric) | 50.8 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 |
| Closure Life | 1000 cycles |
| Maximum Operating Temperature (Fahrenheit) | 200°F |
| Maximum Operating Temperature (Celsius) | 93°C |
| Temperature Resistance | 220°F (104°C) with adhesive |
| Flame Retardant | No |
| Units per Case | 1 Roll |
| Smallest Saleable Unit | Roll |
| Brand | Dual Lock™ |
| Type | Type 250 |
Order 3M Dual Lock Reclosable Fastener SJ3440 Black 2in 50yd at wholesale prices for companies and factories in Iraq and Middle East, get the best deals on bulk purchases, contact us today.
