The Culture of Southern Precision Spring

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Torsion Springs
  • Wire Size 0.020-0.270
  • Any Material
Extension Springs
  • Wire Size 0.030-0.275
  • Any Material
Compression Springs
  • Wire Size 0.015-0.286
  • Any Material
Wire Forms & Assemblies
  • Wire Size 0.030-0.275
  • Any Material


Compression Springs are often ground in order to provide squareness during operation. Take a look at the grind process at our facility in Charlotte, NC.
Color Code
Providing value to our customers by differentiating similar looking parts using distinct colored paint.
Waterborne Paint
Our in-line paint process is very affordable, environmentally friendly and provides moderate rust protection for mechanical springs.
Sound Dampening
Our foam process has been the driver of innovation at Southern Precision Spring for over three decades. We have been successful at reducing vibration and noise in closed coil springs while keeping prices competitive. Read about this process here.
Metal Improvement
Shot Peen, also known as Peening, is the process used to increase operating life by conditioning the surface area using small pellet sized shot. The commercial origins of this process date back to the 1930’s and were used extensively in the automotive industry. Southern Precision Spring encourages the use of shot peening for compression springs with high stresses and cycles. Some have tried to combat hook stresses in extension springs with shot peening; however, our experiences show that since the shot cannot treat the inner coils of the extension spring, the stresses are even higher, compromising the integrity of the parts.
Rust Inhibitors
Environmentally friendly option that increases the shelf life of products from Southern Precision Spring.
Outside Services
Clear & Yellow Zinc
This finish provides a corrosion protection along with a passivate option with a colored clear or yellow die. The process of Zinc Plating has changed due to the knowledge of hazardous hexavalent chromates. Clear and Yellow Zinc is now a thick or thin film Trivalent Passivate finish with a die, the exact color is harder to control and has no correlation with the more color the better plating. The same goes for our clear zinc plating.
Zinc Nickel
While providing great alloy distribution, Zinc Nickel is certainly one of the most tested corrosion resistors. It is usually plated from an alkaline electrolyte; however, on rare occasion acid-Zinc Nickel can be used.
Zinc Phosphate & Oil
Zinc Phosphate coatings provide protection by changing the outside metallic spring into a polycrystalline coating and adding an oil or wax finish. The uniformed grey/black appearance is a bonus to this magnificent defender.
Our passivation process is a two-step formula that provides a protective oxide finish on Stainless Steel Parts. First, the parts are cleaned of dirt and other contaminates then they are ready for immersion in a passivating acid bath.
E-Coat is another name for electro-coating or electroplating. It is an evenly dispersed paint used for applications where thickness variations may be a concern.
Powder Coat
Providing weather and UV resistance to our mechanical springs, powder coating is a very distinct glossy finished part generally applied to springs with significant exposure to customer’s vision and weather.
Other Dip Spin Processes Exceeding 500 HR Salt Spray – If you do not see a coating listed, feel free to ask our engineers. We are not limited to only providing the processes shown and enjoy looking at more creative options.

Contact Us

Physical Address
  • 2200 Old Steele Creek Road
  • Charlotte, NC 28208
Mailing Address
  • Box 668186
  • Charlotte, NC 28266
Contact Info