3M 7010315781 Dual Lock Reclosable Fastener SJ3440 Black

Product Description

The 3M 7010315781 is a plain-backed, no-adhesive Dual Lock Reclosable Fastener supplied on a roll measuring 0.5 inches wide by 50 yards long. The fastener features 250 mushroom-shaped stems per square inch and an engaged thickness of 4.1 mm. When mated face-to-face, the interlocking stems generate tensile strength high enough to substitute for screws, rivets, and other mechanical fasteners. The black color and compact stem profile make it suitable for applications where a clean, finished appearance is required. Trade professionals and OEM assembly technicians use this fastener wherever a reliable, repositionable mechanical closure is needed without adhesive.

The SJ3440 Dual Lock fastener is used across a broad range of industries including transportation, electronics, business equipment, machinery, medical equipment, and sign and display fabrication. Its plain-backed design allows it to be paired with adhesive transfer tapes, heat bonding, or mechanical attachment methods suited to the substrate. The roll format supports high-volume cutting and custom-length installation in production or field service environments.

Key Features

• 250 stems per square inch for high tensile closure strength
• Plain backed with no adhesive — pairs with separately selected bonding method
• Engaged thickness of 4.1 mm for consistent interlock depth
• Roll format: 0.5 inches wide by 50 yards long for flexible cut-to-length use
• Black color for discrete or finished-appearance installations
• Reclosable design allows repeated engagement and release without degradation

Compatibility

Designed for use as a reclosable mechanical fastener in transportation, electronics, business equipment, machinery, medical, and sign and display applications where no-adhesive plain-backed fastener tape is required.

Installation Notes

Installation method depends on substrate — attach using adhesive transfer tape, epoxy, or mechanical fastening appropriate to the surface material. Ensure mating surfaces are clean and free of oil, dust, or contamination before bonding the fastener strip. Cut to length using shears or a utility knife. Align mating strips carefully before pressing together, as the interlocking stems engage immediately on contact.

Technical Specifications

• Stem Density: 250 stems per square inch
• Engaged Thickness: 4.1 mm
• Width: 0.5 inches
• Length: 50 yards
• Color: Black
• Backing: Plain, no adhesive
• Weight: 2.11 pounds
• Unit of Measure: Roll

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7010315781