THE PREMIUM SELF-DRILLING SCREWS USE FOR TILE SHARPED ROOF STEEL
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THE PREMIUM SELF-DRILLING SCREWS USE FOR TILE SHARPED ROOF STEEL
Material: Specific hardened steel.
Head type: Hexagon (soket 8 mm).
Thread diameter: #12 gauge (5.5 mm).
Thread type: Double thread.
Spiral knurl (patented)
Washer: EPDM seal or Alu EPDM bonded washer.
Drill capacity: Max 6.0 mm.
Finish: KOKEN self-drilling screws apply Hi-tech coating technology, tested according to Australian standard AS3566.2 and DIN 50018 for corossion effectiveness more than 2 - 4 years compared to orther traditional silver coating screws.