Shop 3M Dual Lock Reclosable Fastener SJ3440 Black 1 inch 50 yard In Iraq Best Prices
Professional black reclosable fastener with 250 stem density mushroom heads, 1 inch x 50 yard roll, non-adhesive backing, ideal for industrial assembly and panel attachment with audible snap verification.
The 3M™ Dual Lock™ Reclosable Fastener SJ3440 is a professional-grade fastening solution featuring interlocking mushroom-shaped heads with 250 stem density per square inch. This black fastener provides strong, reliable, and durable fastening that can be opened and closed multiple times, making it an excellent alternative to traditional screws, nuts, and bolts. The product comes in a convenient roll format measuring 1 inch wide by 50 yards long, with 2 rolls per case, offering substantial coverage for industrial applications.
Designed for industrial and occupational use, this non-adhesive fastener requires attachment using hot melt, epoxy, or liquid adhesives. The fastener features exceptional design flexibility, allowing for easy positioning of parts before snapping together with an audible click that verifies secure closure. With a maximum operating temperature of 200°F (93°C) and an engaged thickness of 0.16 inches (4.1 mm), it maintains excellent performance across various indoor and outdoor applications. The fastener can mate with Type 170, Type 250, or Type 400 stem densities to provide different strength combinations tailored to specific project requirements.
This reclosable fastening system delivers hundreds of reattachments while maintaining strength throughout multiple attachments and detachments. It provides a lightweight alternative to metal fasteners, remains hidden beneath surfaces, and does not interfere with material integrity. The product is well-suited for applications including graphics attachment, kiosk assembly, panel attachment systems, and sensor attachment across construction, electronics, furniture, general industrial, medical, and transportation industries.
Key Features
- Black interlocking mushroom-shaped heads with 250 stem density per square inch for strong, reliable fastening
- Can be opened and closed multiple times with hundreds of reattachments while maintaining strength
- Non-adhesive backing compatible with hot melt, epoxy, or liquid adhesives for flexible attachment options
- Audible snap closure verification ensures secure fastening without additional confirmation needed
- Compatible with Type 170, Type 250, and Type 400 stem densities for customizable strength combinations
Technical Specifications
| Specification |
Value |
| Product Number | SJ3440 |
| UPC Code | 00021200658082 |
| 3M ID | 7000001979 |
| Overall Width (Imperial) | 1 inch |
| Overall Width (Metric) | 25.4 mm |
| Overall Length (Imperial) | 50 yards |
| Overall Length (Metric) | 45.72 meters |
| Engaged Thickness (Imperial) | 0.16 inches |
| Engaged Thickness (Metric) | 4.1 mm |
| Product Form | Roll |
| Product Color | Black |
| Backing Material | Polyolefin |
| Adhesive Type | Non-adhesive |
| Stem Density | 250 per square inch |
| 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 |
| Flame Retardant | No |
| Brand | 3M Dual Lock™ |
| Type Classification | Type 250 |
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