SS316 Black Anodized Tension Spring

SS316 Black Anodized Tension Spring

SS316 Black Anodized Tension Spring

Product Details

SS316 black anodized extension spring 


Carbon steel, alloy steel, stainless steel, spring steel and bronze or as you request

Wire diameter


Outside diameter

Above 1mm


The overall length of a spring in the unloaded position

Total coils

The total number of coils including the active coils, the top and bottom ends

Active coils

The coils which are free to deflect under a force.

Load type /Load

Torsion /Our computer program can assist you on the load design

Type of ends

Straight/short hook/double torsion/hinge/straight torsion/special

Direction of coils


Surface treatment

Nickel / Zinc / Gold / Silver / Tin / Chromium / Yellow Zinc / Oxide black or Customizable etc.


Advanced CNC computer spring machines with high precision and efficiency, high quality heat treatment and testing machine


Experienced engineers and technicians; Skilled Workers


High-quality raw material, strict and careful inspection


ISO9001:2008 ,ISO14001and ROHs


High and durable quality(long service life, good hardness and resistance), suitable price, fast delivery.


All kinds of cars, machinery, home appliance, electronic products, electric appliance, stationery, computers, power switches, miniature switches, architecture, commodity and A/V equipment, hardware and plastic molds, sports equipment and gifts, and more



Payment terms



7-15 days


Inner plastic bag, outer carton box, and advised by customer.

  • Slightly magnetic stainless steel 302 per ASTM A313 for greater corrosion resistance than steel music wire

  • Full twist loop ends for secure fastening

  • Load capacity of 6 pounds

  • Maximum operating temperature of 500 degrees F (260 degrees C)

  • Passivated for enhanced corrosion resistance

This extension spring is made of stainless steel 302 and has an outside diameter (OD) of 0.3 inch and a wire size of 0.037 inch. It is made of slightly magnetic stainless steel 302 for greater resistance to corrosion than steel music wire. The spring ends are full twist loops for secure fastening. This spring has a load capacity of 6 pounds, and a maximum operating temperature of 500 degrees F (260 degrees C). The surface is passivated for enhanced corrosion resistance. This stainless steel 302 spring meets American Society for Testing and Materials (ASTM) standard A313 for quality assurance.

Extension springs are open-coil spiral (helical) springs that offer resistance to a tension force, or load, applied along the axis of the spring. When a load is placed on an extension spring, making it longer, the spring pulls back against the load to return to its original length. These springs are used in a variety of applications, including automotive engines, major appliances, medical devices, electronics, and sensitive measuring instruments.

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