3M™ Dual Lock™ Reclosable Fastener 250/4123, 13357177, 25.4 mm x 25.4 mm

Convenient for Automotive Trim
The 3M Dual Lock Reclosable Fastener SJ3223 is the perfect solution for attaching automotive trim components. It provides a high-strength closure that is not only easy to assemble but also easy to open and reclose, making it ideal for high cycle applications. When the pieces are pressed together, they audibly snap together with a satisfying click, forming a secure and dependable attachment.

This fastener is designed with hundreds of interlocking mushroom-shaped stems made of polypropylene. It can replace conventional attachments like screws or adhesives, which can be time-consuming to fit and assemble, weaken the part, or be affected by vibration and weather extremes. The Dual Lock fastener is constructed with polyolefin stems that hold tight regardless of high heat, cold, moisture, or humidity. In fact, these fasteners not only hold tight but also reduce vibration and rattling, making them an excellent attachment solution when vibration is an issue. The non-woven backing enables attachment to automotive substrates with hot-melt or liquid adhesives.

How It Works
The 3M Dual Lock Reclosable Fastener works by flexing the stems and sliding the mushroom heads past each other when two pieces are pressed together. Once the opposing mating piece is passed, the stems snap back into their original position and the opposing mushroom heads interlock. These fasteners provide high tensile strength but can be easily opened by cleaving or peeling open the closure. Alignment and re-alignment are simple and require no special tools. This means that components can be attached using these fasteners before they enter the final assembly plant, reducing the number of parts and assembly time.

Stem Densities
The Dual Lock fasteners are available in three different stem densities: 170, 250, and 400 stems per square inch. The Dual Lock fastener SJ3223 has 250 stems per square inch (25mm), offering the tightest hold. It can be mated to Type 170, 250, or 400 for adjustable and proportional engagement and disengagement force to meet application requirements.

Recommended Applications
The 3M Dual Lock Reclosable Fasteners are versatile and can replace conventional mechanical fasteners in a wide range of assembly and attachment applications where reclosability or serviceability is desired. They are primarily used to secure rigid and semi-rigid surfaces such as trim or door panels, instrument panel bezels, headliners, and other automotive interior and exterior trim. These fasteners are also suitable for attaching accessories and equipment, window and door trim panels, sunroof rings, and for vibration and sound damping control.

3M Science Delivers Closures You Can Count On
When it comes to high-strength, reclosable fastening systems, 3M Dual Lock Reclosable Fasteners are the ideal choice. These fasteners have been engineered using a combination of physics and materials science to provide the automotive industry with reliable and high-performance solutions. They can withstand exposure to high moisture levels and wide temperature ranges without compromising their performance. For applications that require multiple closures, the 3M Dual Lock Reclosable Fastener SJ3223 offers long-lasting durability. It is yet another example of how 3M technologies advance operations in the automotive industry, providing both ease of use and superior results.