3M 7010339596 Dual Lock Reclosable Fastener SJ3442 Black

Product Description

The 3M 7010339596 is a plain-backed, no-adhesive reclosable fastener strip sold in a 1-inch wide by 50-yard roll. The SJ3442 features 170 mushroom-shaped stems per square inch. When two strips are pressed together, the interlocking stems generate tensile strength capable of replacing conventional mechanical fasteners. The engaged thickness measures 0.16 inches. The strip is black and ships without a pressure-sensitive adhesive backing, making it suited for applications where the fastener will be bonded, sewn, or otherwise attached by the installer. Trade professionals and assembly technicians use this format for clean, repeated open-and-close attachment points.

This fastener has a documented history of use across transportation, electronics, business equipment, industrial machinery, medical devices, and sign and display applications. The no-adhesive plain back provides flexibility in mounting method, allowing the strip to be die-cut, heat-welded, or mechanically fastened to a substrate. It is well suited to both light-gauge panel attachment and equipment access covers where tool-free reclosable fastening is required.

Key Features

• 170 stems per square inch for high-density interlocking engagement
• Engaged thickness of 0.16 inches when two mating strips are joined
• Plain back with no adhesive — compatible with a wide range of secondary attachment methods
• Black color for low-visibility or color-matched installations
• 1-inch wide strip on a continuous 50-yard roll for field cutting to length
• Mushroom-stem geometry generates tensile strength sufficient to replace mechanical fasteners

Compatibility

Designed as an OEM-style reclosable fastener strip for use wherever a plain-backed, no-adhesive Dual Lock format is specified in transportation, electronics, industrial equipment, medical, or display assembly applications.

Installation Notes

Installation is performed by fabricators, assembly technicians, or trade professionals depending on the end application. The plain back requires a secondary bonding or mechanical attachment step before the fastener is placed into service. Cut the strip to length using a sharp utility knife or shears; avoid crushing the stems during cutting. Ensure the mating substrate is clean and dry before applying any adhesive or heat-weld process to the back surface.

Technical Specifications

• Stem Density: 170 stems per square inch
• Engaged Thickness: 0.16 inches
• Width: 1 inch
• Length: 50 yards
• Backing Type: Plain, no adhesive
• Color: Black
• Weight: 2.8 pounds
• Unit of Measure: Roll
• UPC: 00021200862304

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7010339596