3M Dual Lock Reclosable Fastener (SJ3871, Type 400)

3M Dual Lock SJ3871 Type 400 is a high‑strength, reclosable fastener supplied in 1-meter lengths engineered for demanding industrial applications where reliable bonding, clean aesthetics, and repeated opening/closing cycles are essential. Featuring 3M’s Type 400 stem density and a durable acrylic adhesive, this fastener delivers exceptional holding power on metals, plastics, glass, and painted surfaces.

Supplied in 1 meter lengths

Key Features

• Type 400 Stem Density — Offers a strong, rigid snap‑lock engagement for secure fastening in high‑stress environments.

• High‑Performance Acrylic Adhesive — Bonds to a wide range of substrates including metals, powder‑coated surfaces, and high‑energy plastics.

• Reclosable Design — Opens and closes up to 1,000+ times without losing holding strength, reducing maintenance and hardware costs.

• Temperature & UV Resistant — Performs reliably in indoor and outdoor conditions, including heat, humidity, and sunlight exposure.

• Clean, Tool‑Free Installation — No drilling, screws, or mechanical fixings required.

Technical Specifications

• Model: 3M SJ3871

• Type: Dual Lock Reclosable Fastener, Type 400

• Adhesive: High‑strength acrylic

• Closure Strength: High (400 stems/in²)

• Colour: Black

• Temperature Range: Typically −30°C to +95°C (varies by substrate)

• Applications: Industrial equipment, automotive interiors, signage, access panels, electronics, displays, and mounting solutions.

Why Choose 3M SJ3871 Type 400?

This fastener is ideal when you need a strong, vibration‑resistant bond that can still be reopened for servicing or repositioning. It’s widely used in manufacturing, automotive, aerospace, retail displays, and electrical enclosures, making it a trusted choice for engineers and installers who demand reliability.