1-2 Outer Diameter
1/2" (0.5) Inch Outer Diameter Standard Extension Springs
Definition of 1/2" Outer Diameter Extension Springs:
A 1/2" (one half of an inch) outer diameter extension spring has an outer diameter of 0.5 inches. This is a commonly used spring size in industrial and mechanical applications that demand moderate to high tension. These springs offer powerful extension capabilities while maintaining a durable and compact profile.
At The Spring Store by Acxess Spring, you’ll find a wide selection of 1/2" OD extension springs with various wire diameters, hook styles, coil counts, and load strengths.
How To Measure Your 1/2" Inner Diameter Stock Extension Spring




Your 1/2" (one half of an inch) extension spring’s outer diameter is a key specification that affects its fit, tension capacity, and overall performance. A 1/2" OD extension spring provides dependable pulling force for a wide range of mechanical assemblies and tension-based systems.
The 1/2" (0.5) OD extension springs available in our catalog come in diverse combinations of wire diameter, coil count, body length, and hook style — each of which alters how the spring performs under stress and repeated extension.
All our 1/2" OD extension springs are made with 302 stainless steel (ASTM A 313) or music wire (ASTM A 228) to ensure maximum durability, elasticity, and corrosion resistance in demanding environments.
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Price Part Number Image Ship typeOutside Diameter
Ship type
Inside Diameter
Outside Diameter
Free Length
Inside Diameter
Rate
Free Length
Max. Deflection
Spring rate or spring constant: The amout of force required to move the spring 1 inch of distance or in millimeters the amount of force required to move the spring 1 millimeter of distance.
Max. Load
Max. Deflection
Solid Height
The maximum amount of force or load you can place on this spring. If you put more force than this you will distort or fatigue the spring.
Wire Diameter
Solid Height
Total Coils
Wire Diameter
Material Type
Total Coils
End Type
Material Type
End Type