Bi-Metal stainless steel self-tapping screw | manufacturers in China

· Designed to attach the steel plate or aluminium
· High Anti -Corrosion Resistance for extended life cycles
· Material SUS A2-304 with case-hardened sharp point
· Hardened drill point enables the screws to drill carbon steel sections and by having the leads formed on this hardened point allows correct tapping at high drilling speed
· Tin & Zinc based mechanically deposited high anti-corrosive Ruspert Coating to provide additional cover against scratches, gas and weathering

Additional information


#10~ #14, 19 ~ 60mm


A2(ss304) with SS or carbon steel drill point case hardened

Head Type

Hex , Flat, Pan, Truss, Round, Hex Washer, Oval, Pan Framing, Bugle, Fillister

Drive Type

Phil, Torx, slotted, Phil & Slotted combination, Hex Socket




Zinc plated(clear/bule/yellow), black/grey phosphate, nickel, ruspert, painted


Bulk in cartons (25kg Max.) + wooden pallets or according to customer demand.


Fastening steel to steel framing profiles with or without intermediate insulation material

Bi-Metal stainless steel self-tapping screw | manufacturers in China

Torx drive hex washer head BI-METAL Self Tapping Sheet Metal Screw w/ Bond Seal Washer Made of Stainless Steel 304+ SS/CS provides superior corrosion resistance

Manufactured from SS 304 (A2) grade Austenitic Stainless Steel for maximum corrosion resistance with hardened SS410/SS420 or carbon steel sharp tip for maximum drilling performance.

Fastens sheet metal fast: used extensively for side-lap stitching on exposed fastener metal panel roofs.

Assembled with EPDM (Ethylene, Propylene and proportion of Diene) bonded washer for safe sealing of every screw

Environmental protection ruspert coating, which has a 1000-1500 hours’ salt spray test time and multi-color matching, it provides a better barrier to prevent the corrosion.

the top manufacturer of BI-METAL SCREW in China

Fastener SS304/SS316 Body + SS410/420/CS Point, Self Drilling/Tapping Roofing Bi-Metal Screw with SS EPDM Washer

Our bi-metal screw is made by welding stainless steel together with SS420 or carbon steel.

Its head and body is composed of 300 series stainless steel for corrosion resistance, and its point is composed of SS420 or carbon steel hardened for self-drilling and self-tapping.

Our sharp point bi-metal screw drill capacity is up to 1mm+1mm galvanized steel plate without pre-dirlling, which improves work efficiency for projects.

You will see from videos of:

· How is bi-metal screw made

· How bi-metal screws are tested


The SuperFix Bi-metal Screws are well tested such as:
· Hardness
· Torque test
· Wring Force
· Tensile Strength
· The shear stress
· Extraction resistance and pull through
· Coating thickness SST (up to 1500 hrs)

More Bi-Metal Screws

  1. Torx drive Bi-metal screw with bonded washer self drilling
  2. Hex washer head Bi-metal screw with A2 bonded washer drill point
  3. Wafer head Bi-metal self drilling screw ruspert coated 500hrs
  4. CSK head Bi-metal Tek self drilling screw ruspert coated

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