DIN 7504 Fastener Screws , 5.5 x 50 Hex Washer Head Bi Metal Self Drilling Screws

DIN 7504 Fastener Screws , 5.5 x 50 Hex Washer Head Bi Metal Self Drilling Screws

Bi-metal Self Drilling Screws?with hexagon washer head combined with a EPDM bonded washer ,full tapping threads with drilling point that can cut and drill fast into metal sheet in a power drill .

Bi-metal self drilling tapping screws are made in two different materials for combination of durable corrosion and strong hardness . Normally , Bi-metal self-drilling tapping screws are made of stainless steel but drilling point is made from carbon steel so that screws can be capable of drilling metal sheets smoothly and work for a long time .

Typical Features

1 Strong hardness

2 Perfect durable corrosion

3 Recyclable?

4 Fast drilling rate

Specification

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? DIN7504

Note :

1 , We offer non-standard sizes as well .

2 , Bonded EPDM ?washer is optional .

Bi-metal self-drilling tapping screws must to be plated a film protective finish to prevent screws from?rusting?and extend service time . we supply different finish?for different applications , you can make a right choice according to the characteristic each kind .

1 ,?Zinc?

This is popular finish and various colors for choice . The resistance of rust is good and eco-friendly .

2 ,?Nickel?

Nickel finish makes the surface of the screws will more bright and hardened and the performance of screws will be improved .

3 ,?Polishing

Bi-metal self-drilling tapping screws can be polished after forming for getting a bright surface and anti-rust purpose , but it is not good as other finishes on anti-rust . polish is usually for stainless steel screws.

4 ,?Tin?

It is very perfect to be anti-rust , and widely used to components .

5 ,?Brass?

It?is available for stainless steel screws and carbon steel screws and perfect on durable corrosion?.

6 ,?Dacromet

This finish is used for screws with big sizes and can stop screws to be rusted long time even under bad surroundings .

More options for bi-metal self-drilling tapping screws

Stainless steel : SUS 201