Hex Head Washer Screw

Specification：31 x 4MM  

Customers can customize the specifications  

Material：410 stainless steel   

Materials can be iron or stainless steel 

Surface process：Dacromet

The surface treatment in addition to dacromet can also do nickel or zinc plating(coloured zinc and white zinc)

The surface treatment color may have the bronze color, the light bronze color, the teal gray color and so on, may make to order by the customer

All screws are salt mist tested. The proportion of salt water is 5% and the requirement of salt fog is 1000-3000 hours. After the test, all the screws are free from rust.       

Stainless steel material                                                                                                                                 

Hex head washer screw is a metal screw made of 100% 410 stainless steel, which belongs to one of the highest degree of corrosion resistant steel. It has a longer service life than other screws made of other materials on the market.

Tapping

Hex head washer screws are not only suitable for indoor and outdoor use, but also important parts of self squaring gate stop hardware. Stainless steel drilling screws are superior to ordinary steel and have good rust resistance in water.