Extension Springs

Extension springs are tight wound, helical springs that create a resistance to a pulling force. These springs are wound with an initial tension that holds the coils together. Initial tension is the force it takes to separate the coils. We can make these springs with machine hooks or loops, cross-over hooks or loops, extended hooks, swivel hooks, or any other type to fit your application.

Specifications
Extension Spring Materials Beryllium Copper
Chrome Silicon
Chrome Vinadium
Elgiloy
Hard Drawn
Inconel 600
Inconel 718
Inconel X750
Monel 400
Monel K-500
Music Wire
Oil Tempered
Phosphor Bronze and Brass
Stainless Steel 17-7
Stainless Steel 302
Stainless Steel 316
Extension Spring Finishing Black Oxide
Painted
Passivate
Plain
Yellow Zinc
Clear Zinc (Silver)
Extension Spring Wire Size 0.008 to 0.562 in
0.203 to 14.275 mm
Larger Sizes Available Upon Request
Extension Spring Diameter 0.030 to 10.00 in
0.762 to 254 mm
Larger Sizes Available Upon Request
Number of Coils 1 to 1000+
Extension Spring Free Length 0.008 to 1200 in
0.2032 to 30480 mm
Larger Sizes Available Upon Request
Direction of Wind Left
Right
Extension Spring End Types Hooks
Loops
Swivels
Extension Spring Type of Loops Machines Hooks
Crossover
Single Full Loop
Double Full Loop
Side Hooks
Extended
Machine Cut
Tapered
Industries Served Aerospace
Agricultural
Automotive
Aviation
Chemical
Construction
Electrical
Electronics
Fitness Equipment
Food Processing
Machinery
Marine
Medical
Mining
Oil, Gas, Petroleum
Optical
Packaging
Pharmaceutical
Railroad
Safety
Solar
Sporting
and many more

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