Self-Tapping Threaded Inserts from China Suppliers - Durable Inserts for Strong, Reusable Threads | Factory Direct

303 Stainless Steel
Excellent corrosion resistance and machinability for general-purpose use.

316/316L Stainless Steel
Superior pitting and chloride resistance for marine, chemical, and food-processing environments.

4140 Alloy Steel, Zinc-Nickel Plated
High tensile strength and cost-effective for automotive and tooling applications.

Brass C36000
Non-sparking and non-magnetic, ideal for electrical housings and precision instruments.
Frequently Asked Questions (FAQ)
What are the key benefits of 303 Stainless Steel?
303 Stainless Steel offers excellent corrosion resistance and outstanding machinability, making it the ideal choice for general-purpose applications.
When should I choose 316/316L Stainless Steel over other materials?
You should choose 316/316L Stainless Steel for applications in marine, chemical, and food-processing environments due to its superior resistance to pitting and chloride corrosion.
What makes 4140 Alloy Steel suitable for automotive applications?
Our 4140 Alloy Steel is zinc-nickel plated, providing high tensile strength and a cost-effective solution specifically suited for automotive and tooling industries.
What are the unique properties of Brass C36000?
Brass C36000 is non-sparking and non-magnetic, which makes it highly suitable for manufacturing electrical housings and precision instruments.
How does the heat treatment process prevent galling?
To prevent galling, the materials undergo a specialized heat treatment process where the external cutting zone is hardened to 40–48 HRC, while the internal threads are kept at a softer 28–32 HRC.


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