Self-Tapping Threaded Inserts from China Factory - Reliable Suppliers for Durable Reusable Thread Solutions

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.
All materials are heat-treated to 40–48 HRC on the external cutting zone, while the internal threads remain at 28–32 HRC to prevent galling.
Frequently Asked Questions
What are the primary benefits of 303 Stainless Steel?
303 Stainless Steel offers excellent corrosion resistance and exceptional machinability, making it ideal for general-purpose components and high-efficiency production runs.
When should I choose 316/316L Stainless Steel over 303?
Choose 316/316L Stainless Steel when your application requires superior resistance to pitting, chlorides, and harsh environments, such as marine, chemical processing, and food-grade operations.
What makes the Zinc-Nickel plated 4140 Alloy Steel suitable for automotive uses?
It provides high tensile strength combined with cost-efficiency. The Zinc-Nickel plating adds essential corrosion protection, making it highly reliable for heavy-duty automotive and tooling applications.
Why is Brass C36000 ideal for electrical components?
Brass C36000 is naturally non-sparking and non-magnetic, which prevents interference and ensures safety in electrical housings and sensitive precision instruments.
How does the dual-zone heat treatment prevent thread galling?
By heat-treating the external cutting zone to 40–48 HRC for durability, while keeping the internal threads at a softer 28–32 HRC, the materials maintain structural integrity and prevent galling during assembly.


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