316 Stainless Steel Self Tapping Screws

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Stainless steel 316 rust-proof plum head with media and gasket self-tapping screws (316 stainless steel self-tapping screws) are specially designed for plastic, composite materials and corrosion-resistant scenes. They are made of austenitic stainless steel 316 and have both high hardness and super anti-rust performance. The products cover the full range of specifications of K1.8, K2, K2.2, K2.5, K3, and K4. The plum head structure provides high torque tightening capability and integrates an integrated gasket to simplify the installation process and prevent loosening. Suitable for high-demand scenes such as solar brackets, ship components, rail transportation equipment, and outdoor appliances.

Product Features
Super strong anti-rust and anti-corrosion performance: 316 stainless steel contains 2-3% molybdenum, which can significantly improve the ability to resist chloride corrosion. The life span in the salt spray test is 3 times that of 304 stainless steel. It is suitable for high humidity and high salt spray environments such as marine ships and chemical equipment. Surface polishing reduces medium adhesion and prolongs service life.

Product Picture

 

Integrated anti-loosening design

Compared with the cross slot, the torque transmission efficiency of the plum head is increased by 40%, which not only reduces the risk of slipping but also supports automated assembly.

Structure of belt media and belt pad: built-in flat pad + spring pad, continuous preload is generated through the tooth pressing process, and the residual locking force retention rate under vibration environment is ≥85%, which completely solves the loosening caused by thermal expansion and contraction of plastic.

Special thread process for plastic

The self-tapping thread adopts a large lead and shallow tooth angle design to reduce the internal stress of materials such as PP, PC, nylon, etc. and prevent cracking.

The drill-through blade (K1.8-K4 full specification adaptation) can ignore the need for pre-drilling and directly penetrate the reinforced fiber plastic.

Raw Material

Cold Forging

Threading

Auto Lathe

Auto Lathe

Table Lathe

CNC Lathe

Quality Checking

Inspection

Packing

Customized service
Flexible size customization: 316 stainless steel self-tapping screws support non-standard diameter, length and head shape customization, and are delivered within 5-15 days.

Material upgrade options: 316L, duplex steel, titanium alloy, and other special materials are available, suitable for use in pickling equipment, nuclear power plant sealing, and other scenarios.

Surface treatment process: Sijiada bright coating, nickel plating, anti-drop glue, etc. are optional.

Industry application cases
New energy field: Using K4 solar bracket fixing screws, passed 2000 hours of wet heat test, no rust failure.

Clipers Micrometer

Torque

Depth Micrometer

Plug

Thread Guage

Ring Guage

Hardness Tester

Projector

Salt Spray Testing

Shipbuilding: Deck plastic parts assembly screws (available K2.5-K3.0), in line with the classification society's salt spray certification.

Rail transportation: High-speed rail interior plastic panel fasteners (with anti-theft plum blossom slots), vibration resistance meets EN 50155 standards.

Why choose us?
Zeyao Hardware has been deeply involved in the fastener industry for more than 16 years and has profound fastener manufacturing experience. Whether you need 316 stainless steel self-tapping screws for quick payment or special working conditions customization, we can provide technical drawing review and working condition adaptation suggestions, so that each screw becomes a reliable gene of the equipment. Through product life cycle quality management, we ensure that every link from raw material procurement to finished product delivery meets the most stringent industrial standards, providing reliable fastening solutions for your critical equipment.