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3M™ Dual Lock™ Reclosable Fastener SJ3803, Slide-In Piece Part, Stem Density 250, Black

3M™ Dual Lock™ Reclosable Fastener SJ3803
3M™ Dual Lock™ Reclosable Fastener SJ3803
3M™ Dual Lock™ Reclosable Fastener SJ3803 is a black, polypropylene reclosable fastener with a 20 mm x 40 mm, slide-in, rectangular base and has a stem density of 250 stems per square inch.
  • 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.
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Key Attributes

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


Fastener Dimensions40.0 x 15.0 Millimetre
Fastening Area6 cm²
Flange Thickness1.25 Millimetre
Manufacturing SegmentInterior, Exterior
Minimum Flange Width2.5 Millimetre
Outside Dimensions40.0 x 20.0 Millimetre
Piece Parts TypeSlide-In
Product FormPiece
Stem ColorBlack
Stem Density250
Unmated Thickness (metric)5.08 Millimetre