BI-METAL
BACKGROUND

In the construction and manufacturing fastening industries two things has always been very important:

• Sustainability – how long will my fastener last in a given environment?
• Efficiency – how quickly can I fasten it?
• A game changer in the fastening industry was the invention of self-drilling screws, which shortened work processes by great lengths.However as the AISI 300 series stainless steel screws cannot be hardened, the possibilities to make selfdrilling screws with drill points hard enough for drilling into steel was limited to fasteners made out of steel.
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• SUSTAINABILITYFor decades AISI 304 and AISI 316 Austenitic Stainless Steel was considered the first, foremost and only choice in North America for outdoor use in tough environment; coastal and industrial areas, etc..The Austenitic Stainless Steel quality which contents both Chromium and Nickel and even Molybdenum for AISI 316 has excellent corrosion performances and at the same time being very ductile with zero risk of Hydrogen Assisted Stress Corrosion Cracking (HASCC) or better known as Hydrogen Embrittlement.

  DD Fasteners developed suitable cold forging technologies to achieve an effective manufacturing process with a high product quality with good tapping facilities for self-tapping screw, like the typically #1/4 -1-3/4” with 3/8” head with either a AISI 304 or AISI 316 stainless steel EPDM bonded washer added.

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• Stay tuned , Cheers 
  We are DD Fasteners China, screw manufacturer, we focus on producing professional screw products for more than 20 years, we have OEM services for local brands in the Middle East, and widely recognized by customer from all over the world.Website :