Blue Metal Siding Screws Thread Cutting Hex Washer Head 1/4 Fastener Galvanized

Siding screw is one of popular fastener screws , it is similar with roofing screw or self tapping screw with hex washer head or thread cutting screws , siding screw is designed for fastening wooden or plastic or chipboard objects that are widely used in furniture and building . 

Generally , siding screw has a hex washer head and painted in different color like white , black , green . red and yelllow etc . self tapping threads with sharp point and a cutting through 3 or 5 threads on the point for quick cuting material and more steady fastening purpose . and a metal bounded EPDM washer is assembled to under head that can protect  screw to be damaged by rain or sand and provide more good fastening .

Material

Siding screws are made from harden carbon steel and stainless steel or alloy steel are available as well for more options of applications .

Finish 

For the most applications ,siding screws are coated in zinc , nickel and painted head , for some strict request like resistance of corrosion , dacromet is a good choice .

Normally , screws can be passed 48 hours and max 96 hours for zinc plated during salty sprey testing . 

Basic dimensions

Torque

Siding screws have to be operated under given torque when they are to be installed . different specifications different torques

Physical performance

Packing

4 kgs each bag and 5 bags each carton for normal packing , and we provide custom packing for special requirements .

Tips for use

1 . Far from acid or alkalinity etc checmical conditions for longer service .

2 . Not available for heavy duty application .

3 . Do not put over torque on siding screws during operation .