3M™ Dual Lock™ Reclosable Fastener SJ3221, Pop-In Piece Part, Stem Density 250, Black, 20 mm x 20 mm

• Mushroom heads allow flexibility in alignment for easy attachment of components.
• Can be opened and re-closed in high cycle applications.
• Provides hidden component attachment, preventing disruption on the show surface.
• Strong holding power reduces the rattling and vibration of components.
• Does not require any special tools or processing equipment.
• 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.
• Audibly snaps together to form a secure, dependable and repeatable attachment.

3M™ Dual Lock™ Reclosable Fastener SJ3221 is a black, polypropylene reclosable fastener with a pop-in square top, a single disk base and a stem density of 250 stems per square inch.

3M™ Dual Lock™ Reclosable Fasteners Pop-In Parts attach without the use of pressure sensitive adhesive, and come with a variety of bases that can be inserted into holes of precise dimension. They are easy to install and require no special equipment or skills.