Black Self Tappers Self Tapping Flat Head Metal Screws OEM / ODM Available

Steel phillips flat head self tapping screw black zinc 4.8 class

Product Description

Self-tapping screws have a wide range of tip and thread patterns, and are available with almost any possible screw head design. Common features are the screw thread covering the whole length of the screw from tip to head and a pronounced thread hard enough for the intended substrate, often case-hardened.

Product Specification

Countersunk or flat head
Conical, with flat outer face and tapering inner face allowing it to sink into the material. The angle of the screw is measured as the full angle of the cone.

Raw Material: Carbon Steel

Carbon steel is a steel with carbon content up to 2.1% by weight.

As the carbon percentage content rises, steel has the ability to become harder and stronger through heat treating; however, it becomes less ductile. Regardless of the heat treatment, a higher carbon content reduces weldability. In carbon steels, the higher carbon content lowers the melting point.

Galvanization

Galvanization (or galvanizing as it is most commonly called in that industry) is the process of applying a protective zinc coating to steel or iron, to prevent rusting.

Galvanising protects the underlying iron or steel in the following main ways:

• The zinc coating, when intact, prevents corrosive substances from reaching the underlying steel or iron.
• The zinc serves as a sacrificial anode so that even if the coating is scratched, the exposed steel will still be protected by the remaining zinc.
• The zinc protects iron by corroding first. For better results, application of chromates over zinc is also seen as an industrial trend.

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FAQ

Q: Are you trading company or manufacturer ?
A: We have our own factory, which is located in Ningbo, Zhejiang. Both design team & manufacture team will support our products.

Q: What’s your main products? Can customize or not?
A: Our main products are screws.

Q: Do you provide samples? Is it free or extra?
A: Yes, we could offer the sample for free charge if we stock, but do not pay the cost of freight.

If you are interested in self tapping screw, Please do not hesitate to email us or call us. Our professional team will assit you to purchased the quality products.

Ningbo Oukailuo Hardware Co., Ltd. was founded in 1999 and is a leading fastener manufacturer. Company passed ISO9001:2015 quality management system certification, and has ROHS, SGS certificate. Our main export markets are North America, Europe, Oceania, Korea, etc.

We have our own heat treatment shop, electroplating shop, Ruspert workshop. The heat treatment process is very important for product hardness, and our technology can ensure it. Electroplating includes galvanization, yellow zinc, black zinc, and green zinc. All galvanization meets ROHS. Salt spray time can be up to 96 hours. Ruspert can do most of the colors. The salt spray time can be 500 hours and 1000 hours.

OuKaiLuo have over 19 years experience inventory management, managing a growing number of customer production lines on-site to ensure ‘just-in-time’ delivery. We offer many variations of Direct Line Feed management to suit individual needs.