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Two black rolls of reclosable fastener tape with mushroom-shaped heads, 1 inch wide by 50 yards long

3M

3M SJ3550CF Dual Lock reclosable fasteners 1 in x 50 yd Type 250 Black 2 rolls

SKU CH-637R-5A63R MPN SJ3550CF

Black interlocking mushroom-head strips mate with Type 170, 250 or 400 densities and hold up to 220 °F for indoor or outdoor mounting

  • ColorBlack
  • DimensionsOverall Length (Imperial) 50 yd Overall Length (Metric) 45.7
  • Strong, reclosable hold with 250 stem density interlocking mushroom heads
  • Verifies secure closure with an audible snap when pressed together
  • Bonds reliably to metals, glass and plastics with clear acrylic adhesive
  • Withstands temperatures up to 220F (104C) for indoor and outdoor use
  • Two 50-yard rolls provide a hidden fastener alternative to screws and bolts

Reclosable fastener system

3M SJ3550CF Dual Lock fasteners use interlocking mushroom-shaped heads to create a strong, hidden closure that snaps audibly when engaged. The clear acrylic adhesive bonds to metals, glass and plastics such as acrylics, polycarbonate and ABS. Two rolls of black tape are supplied for indoor or outdoor use.

250 stem density per square inch

This Type 250 density mates with Type 170, Type 250 or Type 400 counterparts to adjust holding strength. The tape measures 1 in wide by 50 yd long with a total thickness of 226 mil and withstands temperatures up to 220F (104C).

Suits installers needing removable panels

Builders who want a clean aesthetic without visible screws will value the snug fit and reclosable design. Buyers who need a permanent bond or a different stem density for lighter loads should look at alternative fastening methods.

Highlights

  • Strong, reclosable hold with 250 stem density interlocking mushroom heads
  • Verifies secure closure with an audible snap when pressed together
  • Bonds reliably to metals, glass and plastics with clear acrylic adhesive
  • Withstands temperatures up to 220F (104C) for indoor and outdoor use
  • Two 50-yard rolls provide a hidden fastener alternative to screws and bolts

Specifications

Brand3M
ModelSJ3550CF
Part NumberSJ3550CF
ColorBlack
DimensionsOverall Length (Imperial)
50 yd
Overall Length (Metric)
45.7 m, 45.72 m
Overall Width (Imperial)
0.5 in, 0.75 in, 1 in, 2 in, 6 in
Overall Width (Metric)
12.7 mm, 19.05 mm, 25.4 mm, 50.8 mm, 152.4 mm
Total Tape Thickness without Liner (Imperial)
226 mil
Total Tape Thickness without Liner (Metric)
5.74 mm
Shipping weight4.54 kg
Package size538 × 528 × 69 mm

Questions about this item

How does the 250 stem density per square inch perform once installed?

The interlocking mushroom-shaped heads deliver a strong, reliable hold that can be opened and closed repeatedly, securing with an audible snap to confirm closure.

Which stem densities can this Type 250 fastener mate with in practice?

It mates with Type 170, Type 250 or Type 400 stem densities, allowing different strength combinations for the application.

What width and thickness does the 1-inch roll measure for mounting clearance?

The roll is 1 inch (25.4 mm) wide and 226 mil (5.74 mm) thick without the liner, so allow that clearance when planning the mount.

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