DD FASTENERS – a simple pressure gasket providing leak-proof sealing from water, gasses, oils and other fluids. EPDM rubber is vulcanized the metal from the zinc plated mild steel, aluminum, and stainless steel. Bonded washers are the cost-effective solution for roofing screw connection.

EPDM properties are its outstanding heat, ozone and weather resistance.
Quality elastomeric compounding to meet specifications for elasticity, memory, temperature extremes, chemical, ozone, and sunlight-resistance. It has the ability to retain light color. EPDM benefit is not to pollute the runoff rainwater.

Conical design directs flow of facing materials to form a seal conforming to both fastener and sealing surface
Reliable sealing quality for diverse screw. (Roofing, self-taping, self-drilling, tank, slot screws….)

Excellent conductive performance for powder painting screws.
Reduce the failure painting risk.

EPDM heat resistance for 20 minutes:
Black non-conductive EPDM : 170 degrees Celsius (338 Fahrenheit)
Grey EPDM: 150 degrees Celsius (302 Fahrenheit)
Black conductive EPDM: 220 degrees Celsius (428 Fahrenheit)

EPDM Hardness: (customization is available)
Black / Grey non-conductive EPDM: 75 +/- 7 degrees shore A
Black conductive EPDM: 70 +/- 5 degrees shore A
Metal: Galvanized Steel G60 (Z12), G90 (Z27), Aluminum , Stainless Steel (A2)

Self drilling stitching screws designed for joining cladding panels.

Tapered coarse self tapping thread.

Reduced diameter drilling point for fast, easy penetration.

Hexagon head with EPDM bonded sealing washer.

Hexagonal head 8mm(5/16″) across the flats.

Recommended drilling thickness 0.8mm – 2.5mm.

Washer diameter 16mm.

Zinc plated screws.

Screw lengths do not include the head.

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