Waterproof Precision Machined Components Hexagonal Screws OEM

Polestar specializes in CNC machining to provide the best value solutions for our customers.Under the premise of quality assurance, we offer more competitive prices than the market average.We have an experienced team and experience to ensure that our products meet our customers' requirements.

Roofing screws are made of carbon or stainless steel.they are used to fasten metal,plastic and fiberglass rooffing sheets to metal or wood structure.Roofing screws provide secure metal to metal fastening with strong holding power,without the need to pre-drill.We can custom all kinds of roofing screws including painted top screws,stianless roof screws and moreThey save your time and effort by drilling their own holes and fastening in a single operation

Self-drilling screw is a screw that can tap its own hole as it is driven into the material. For hard substrates such as metal or hard plastics, the self-drilling ability is often created by cutting a gap in the continuity of the thread on the screw, generating a flute and cutting edge similar to those on a tap. Thus, whereas a regular machine screw cannot tap its own hole in a metal substrate, a self-drilling one can (within reasonable limits of substrate hardness and depth).

CNC Machining Tolerance: