Black reclosable fastener with 250 stem density mushroom heads, 3/4 inch x 50 yard roll, provides 5X tensile strength of hook-and-loop, bonds to multiple substrates including plastics, 1000 closure cycles, maximum temperature 120°F.
3M™ Dual Lock™ Reclosable Fastener SJ3540 is the easy and clear alternative to traditional fastening methods such as screws, nuts, or bolts. This innovative product features black interlocking mushroom-shaped heads with 250 stem density per square inch, providing up to 5X the tensile strength of typical hook-and-loop products. The fastener is designed to deliver a durable, reclosable fastening solution that can be opened and closed multiple times without losing its holding strength. Each roll measures 3/4 inch wide by 50 yards long, with 2 rolls per case, making it ideal for industrial and occupational applications.
The product utilizes a synthetic rubber-based adhesive with a black polyethylene foam tape backing, protected by a removable film liner. This pressure-sensitive adhesive features quick stick capability and short dwell time, allowing for rapid installation without the need for drilling, screwing, or sewing tools. The fastener mates with Type 170, Type 250, or Type 400 stem densities to provide different strength combinations based on specific application requirements. With an engaged thickness of 226 mils (5.8mm) and maximum operating temperature of 120°F (49°C), this product is best suited for indoor use across various industries including construction, electronics, furniture, medical devices, and transportation.
The 3M Dual Lock Reclosable Fastener SJ3540 provides exceptional design flexibility, allowing for positioning of parts before being snapped together with an audible snap that verifies closure. The fastener can withstand up to 1,000 closure cycles, maintaining its strength throughout multiple attachments and detachments. This lightweight alternative to metal fasteners remains hidden beneath surfaces and does not interfere with material integrity, providing both aesthetic improvements and practical functionality for access panels, interior signage, decorative trim, office partitions, and product identification applications.
Key Features
- Black interlocking mushroom-shaped heads with 250 stem density per square inch for exceptional holding strength
- Provides up to 5X the tensile strength compared to typical hook-and-loop fastening products
- Reclosable design allows opening and closing multiple times maintaining strength through 1000 closure cycles
- Synthetic rubber-based adhesive with quick stick and short dwell time for rapid installation
- Audible snap verification upon closure and secure engagement between mating pieces
- Compatible with Type 170, Type 250, and Type 400 stem densities for customizable strength combinations
- No drilling, screwing, or sewing tools required - tool-free installation
- Bonds well to variety of substrates including low surface energy plastics like polyethylene and polypropylene
- Removable film liner protection with black polyethylene foam backing
- Maximum operating temperature of 120°F (49°C) with good temperature resistance
Technical Specifications
| Specification |
Value |
| Product Number | SJ3540 |
| Part Number | SJ3540 |
| 3M ID | 7100016686 |
| UPC Code | 00051115255939 |
| Product Form | Roll |
| Overall Width (Imperial) | 0.75 inches |
| Overall Width (Metric) | 19.05 millimeters |
| Overall Length (Imperial) | 50 yards |
| Overall Length (Metric) | 45.72 meters |
| Product Color | Black |
| Adhesive Color | Black |
| Stem Density | 250 stems per square inch |
| Engaged Thickness (Imperial) | 226 mils |
| Engaged Thickness (Metric) | 5.8 millimeters |
| Backing Material | Polyolefin |
| Primary Liner | White Polyolefin |
| Primary Liner Thickness (Imperial) | 5 mils |
| Primary Liner Thickness (Metric) | 0.13 millimeters |
| Adhesive Type | Synthetic rubber-based pressure sensitive |
| Maximum Operating Temperature (Fahrenheit) | 120°F |
| Maximum Operating Temperature (Celsius) | 49°C |
| Closure Life | 1000 cycles |
| Flame Retardant | No |
| Indoor/Outdoor | Indoor |
| Units per Case | 2 rolls |
| Smallest Saleable Unit | Roll |
| Brand | 3M Dual Lock |
| Compatible Types | Type 170, Type 250, Type 400 stem densities |
| Recommended Applications | Access panels, Interior signage, Decorative trim, Office partitions, Product IDs |
| Industries | Construction, Electronics, Furniture, General Industrial, MRO, Medical, Military & Government, Packaging, Retail, Specialty Vehicles, Transportation |
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