Unlock Simplicity
Durable and secure, 3M™ Dual Lock™ Reclosable Fastener SJ3443 has exceptional strength through its interlocking mushroom-shaped heads (400 stem density per square inch), providing up to 5X the tensile strength of typical hook-and-loop products. With 3M™ Dual Lock™ Reclosable Fastener SJ3443, there is no need for any drilling or screwing.
Recommended Applications:
- Alternative to pressure sensitive adhesives
Design Flexibility
3M™ Dual Lock™ Reclosable Fastener SJ3443 consists of interlocking mushroom-shaped heads that easily slide over each other, allowing for positioning of parts before being snapped together. This fastening process creates a durable attachment and provides fast product assembly with great design flexibility. 3M reclosable fasteners can also engage with different stem densities for varying levels of strength and system performance.
Available in Convenient Mini Packs
3M™ Dual Lock™ Reclosable Fasteners sound an audible snap when secure, which verifies closure of the attachment. To disengage, simply peel the pieces apart by hand. 3M fasteners maintain their strength throughout multiple attachments and detachments. A lightweight alternative to metal fasteners, this product remains hidden beneath surfaces and does not interfere with the integrity of your material—providing aesthetic improvements and design flexibility.
Hundreds of Reattachments in a Snap
When two pieces of 3M™ Dual Lock™ Reclosable Fasteners mate, the stems flex and the mushroom heads slide past each other. After passing the opposing mating piece, the stems snap back into their original position and the opposing mushroom heads interlock. These fasteners can provide high tensile strength but can be opened by simply cleaving or peeling open the closure. This product is well suited for many indoor applications where a good performance, high strength, reclosable fastening system is required.
Delivers Long-Lasting Performance
Not all design requirements are easily satisfied, but you can simplify your attachments. When you need a strong, reliable, yet removable closure, 3M™ Dual Lock™ Reclosable Fasteners are the easy alternative to traditional fastening methods such as screws, nuts or bolts.

Standard Abrasives 840032, Quick Change Surface Conditioning FE Disc, A/O Medium, TSM, Maroon, 3/4 in, QS75KM, 7000046846, 50/case
ACS CX1250 Diamond Belts, 1/2" X 24" 45u
3M 45120, Cartridge RoII Mandrel, 3/32 in x 3/4 in x 1/4 in, 7010328349
3M 33349, 641WY 1/4" X 24", 220 Mesh Diamond Cloth Belt, 7010534919
3M 49830, Multi-Purpose Duct Tape 3900, Red, 48 mm x 54.8 m, 8.1 mil, 7000144749
3M 03027, Scotch General Purpose Cloth Duct Tape 393, Silver, 48 mm x 54.8 m, 12 mil, 7000048964
3M 16162, PTFE Glass Cloth Tape 5453, Brown, 2 in x 36 yd, 8.2 mil, 7000144794
3M 77197, Scotch-Brite™ Roloc™ Deburr and Finish PRO Unitized Wheel,TR, 3 in x 1/8 in x NH, 8C CRS+, 7100109130, 40/box
3M 57894, 642WY 1/4" X 24", 50000 Mesh Diamond Cloth Belt, 7100230570
3M 22394, Roloc Disc 361F, 50 YF-weight, TR, 3 in, Die R300V, 7000045096
3M 22393, Roloc Disc 361F, 36 YF-weight, TR, 3 in, Die R300V, 7000045093
3M™ 07010, Supplied Air Respirator Hose W-9435-25/07010(AAD), 25 ft, 3/8 in ID, Industrial Interchange Fittings, High Pressure, 7000005374, 1 EA/Case
3M 50022, Venture Tape Xtreme Cloth Duct Tape 1557, Black, 48 mm x 55 m (1.88 in x 60.1 yd), 7010378552 
