3M™ Dual Lock™ Reclosable Fastener SJ3209, Pop-In Piece Part, Stem Density 250, Black

3M™ Dual Lock™ Reclosable Fastener SJ3209 is a square reclosable fastener with a pop-in “pine tree” stem on the backing for insertion into a hole. It is lined with polyolefin mushroom stems of density 250, and can be paired with other stem densities for varying levels of interlocking strength.

Convenient Assembly and Re-Assembly for Automotive Trim Ideal for attaching automotive OEM trim components, our 3M™ Dual Lock™ Reclosable Fastener SJ3209 provides a high-strength closure that is easy to assemble and just as easy to open and reclose in high cycle applications. Moreover, the pieces audibly snap together with a satisfying click to form a secure, dependable and repeatable attachment. Designed with hundreds of interlocking mushroom-shaped stems, Dual Lock fasteners can replace conventional attachments such as screws or adhesives, which can be time-consuming to fit and assemble, may weaken the part, or are susceptible to vibration and weather extremes. Dual Lock fasteners are constructed of polyolefin and hold tight regardless of high heat, cold, moisture or humidity. These fasteners are also an excellent attachment solution when vibration is an issue – not only do the fasteners hold tight, but actually reduce vibration and rattling. Additional Features include: Fast assembly with no drilling or additional tools required Hidden attachment avoids unsightly mechanical fasteners on the show surface High temperature and solvent resistance Mushroom heads that allow flexibility in alignment for easy attachment of components Can be used to attach components before they enter the final assembly plant, thus helping to reduce the number of parts and the length of assembly time Combinations of stem densities and the engaged area provide adjustable and proportional engagement and disengagement forces An audible snap confirms that the part is correctly installed with minimal insertion force required by the assembly worker Can be opened and closed hundreds of times – allowing easy access to areas behind closeout panels, headliners and trunk liners How It Works This pop-in fastener has a polypropylene post on the back designed to be inserted into a round hole where attachment is desired. Its “pine tree stems” grip the in