3M™ Dual Lock™ Reclosable Fastener TB3870, Black, 1 in x 10 ft, Type 250/250, (1 Mated Strip/Bag) 8 Bag/Case

The 3M™ Dual Lock™ Reclosable Fastener TB3870 has a modified acrylic pressure sensitive adhesive on the back of a black polypropylene reclosable fastener with 250 stems per square inch. This product can be used both indoors and outside in a variety of applications; and has a slim 0.24 inch engaged thickness and long service life.
Special Price $64.08 Regular Price $75.39
UPC 00051111976333
3M ID 7100023047
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The remarkable 3M™ Dual Lock™ Reclosable Fastener TB3870 can be opened and closed over and over, up to 1,000 times before losing 50% of the original strength for repeated access or repositioning. The mushroom heads easily slide over each other allowing positioning of parts before they are snapped together to create a firm fastening attachment. When mated, the black fasteners are hidden from view and leave you with an unbroken surface to help create a smooth, clean appearance. The type 250 stem density polyolefin fastener mates to Type 170, 250 or 400 giving the user the option of different closure strength depending upon application.

Applications:

Indoor/outdoor Doors Flexible solar panels Headliners Access panels Signs

Display components

The fastener is backed with a modified acrylic pressure sensitive adhesive that bonds to many plastics and powder coated paints; as well as medium to low surface energy materials with little or no surface preparation.

Hear the Snap

"Snap!" it's the one word that best defines the extensive line of 3M™ Dual Lock™ products. Here's how it works: When two pieces of 3M Dual Lock Reclosable Fastener are pressed together, the stems flex and the mushroom heads slide past each other. After passing the mushroom heads on the opposing mating piece, a stem snaps up into its original position, interlocking with the opposing heads. Listen for the audible snap to signal that the fastener is engaged. The attachment formed may be as effective as screws or rivets, but will peel apart for repositioning. 3M Dual Lock Reclosable Fasteners are used extensively in transportation, electronics, business equipment, machinery, medical and sign and display markets.

Lose the Screws

The bond is strong but can easily be detached; just pull apart to disengage and reattach as needed. This means that this product gives you a strong, hidden bond with the convenience of multiple openings and closings so you can lose the screws, rivets, hooks, bolts, zippers and other unsightly attachment methods. In short – this product is an aesthetically pleasing fastener that doesn't sacrifice attachment strength; in fact, the 3M™ Dual Lock™ Reclosable Fastener TB3870 is about five times stronger in tensile strength than 3M™ Hook and Loop fasteners used in comparable applications. In many cases, this attachment method also saves the user money with less material used. Additionally, there's no need to drill holes that might weaken the part or substrate, and no tools required to assemble and remove the part.

You expect more options to secure, attach and connect surfaces. 3M Dual Lock Reclosable Fasteners offer quick installation and high-strength attachment, yet can be opened as easily as zippers. That functional flexibility, as well as superior aesthetics, reduced weight, and savings in labor and installation costs, make innovative 3M fasteners a popular and effective solution.


  • Reclosable system is up to five times stronger in tensile strength than hook-and-loop fasteners
  • Snap-in-place installation replaces screws, nails, snaps and rivets
  • Black fastener is hidden when closed and provides clean, smooth appearance
  • Modified acrylic adhesive bonds well with many plastics, powder coated paints and medium to low surface energy materials
  • Type 250 stem density polyolefin fastener mates to Type 170, 250 or 400, increasing fastening options
  • Ideal for indoor and outdoor use to attach doors, flexible solar panels, headliners, access panels, signs and display components
More Information
3M ID 7100023047
Part number TB3870
Keywords 3M, Dual Lock, Reclosable Fastener, TB3870, modified acrylic adhesive, black polypropylene fastener, indoor use, outdoor use, high tensile strength, snap-in-place installation, clean appearance, medium to low surface energy materials, polyolefin fastener, type 250 stem density, type 170 stem density, type 400 stem density, repeated access, repositioning, mushroom heads, firm fastening attachment, smooth appearance, solar panels attachment, headliners, access panels, signs, display components, transportation use, electronics use, business equipment use, medical use, machine use, strong bond, alternative to screws, alternative to rivets, alternative to bolts, hidden fastener, durable fastener, aesthetic fastener, easy installation, versatile fastener, cost-saving fastener, labor-saving fastener, high-strength attachment, multiple detachments, secure attachment, construction use, automotive use, aerospace application
Global Product Hierarchy Tapes > Reclosable Fasteners > Mushroom Hook Fasteners
Application Interior Mirror & Fixture Attachment, Trim & Molding Attachment, Wall & Door Panel Attachment
Color Family Black
Product Color Black
Product Number TB3870
Product Type simple
Quantity 0
Trademark 1 3M™
Trademark 2 Dual Lock™
Country of Origin United States
SAP Shelf Life In Days 730
Base - Billing Unit BAG
Base - Metric Gross Weight 390.089 G
Base - Metric Height Dimension 50.8 MM
Base - Metric Length Dimension 171.45 MM
Base - Metric Width Dimension 171.45 MM
Base - Item Quantity 1
Base - Unit BAG
Consumer - Billing Unit BAG
Consumer - Customary Cubic Dimension 91.1084499334353 ci
Consumer - Customary Gross Weight 0.859999033934367 lbs
Consumer - Customary Net Weight 0.8254107096201817 lbs
Consumer - Customary Height Dimension 2.0 in
Consumer - Customary Length Dimension 6.75 in
Consumer - Customary Width Dimension 6.75 in
Consumer - Metric Cubic Dimension 1.493 CDM
Consumer - Metric Net Weight 374.4 G
Consumer - Metric Height Dimension 50.8 MM
Consumer - Metric Length Dimension 171.45 MM
Consumer - Metric Width Dimension 171.45 MM
Consumer - Item Quantity 1
Consumer - Total Unit Quantity 1
Consumer - Previous Packaging Level Quantity 1
Consumer - Item Unit BAG
Consumer - Unit BAG
Shipper - Billing Unit BAG
Shipper - Customary Cubic Dimension 1628.6953538474006 ci
Shipper - Customary Gross Weight 6.88062720279003 lbs
Shipper - Customary Net Weight 6.6028447524370835 lbs
Shipper - Customary Height Dimension 7.125984251968504 in
Shipper - Customary Length Dimension 15.118110236220472 in
Shipper - Customary Width Dimension 15.118110236220472 in
Shipper - Metric Cubic Dimension 26689.535 CCM
Shipper - Metric Weight 3.121 KG
Shipper - Metric Net Weight 2.995 KG
Shipper - Metric Height Dimension 18.1 CM
Shipper - Metric Length Dimension 38.4 CM
Shipper - Metric Width Dimension 38.4 CM
Shipper - Item Quantity 8
Shipper - Total Unit Quantity 8
Shipper - Previous Packaging Level Quantity 8
Shipper - Previous Packaging Level Unit BAG
Shipper - Item Unit BAG
Shipper - Unit CS
Pallet - Billing Unit BAG
Pallet - Customary Cubic Dimension 96417.51566967701 ci
Pallet - Customary Gross Weight 284.39631821849207 lbs
Pallet - Customary Net Weight 237.71784344608795 lbs
Pallet - Customary Height Dimension 47.63779527559055 in
Pallet - Customary Length Dimension 48.031496062992126 in
Pallet - Customary Width Dimension 42.125984251968504 in
Pallet - Metric Cubic Dimension 1.58 M3
Pallet - Metric Net Weight 107.827 KG
Pallet - Metric Height Dimension 1.21 M
Pallet - Metric Length Dimension 1.22 M
Pallet - Metric Width Dimension 1.07 M
Pallet - Item Quantity 288
Pallet - Total Unit Quantity 288
Pallet - Previous Packaging Level Quantity 36
Pallet - Previous Packaging Level Unit BOX
Pallet - Item Unit BAG
Pallet - Unit PAL
Pallet - Pallet Layer Quantity 6
Pallet - Shipping Container Per Layer Quantity 6
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