3-4 Outer Diameter
3/4" (0.75) Inch Outer Diameter Standard Extension Springs
Definition of 3/4" Outer Diameter Extension Springs:
A 3/4" (three fourths of an inch) outer diameter extension spring has an outer diameter of 0.75 inches. This large spring size is ideal for applications that require high pulling force, excellent durability, and reliable mechanical strength. These springs are used in heavy-duty tools, automotive systems, industrial machinery, and equipment that operates under continuous tension.
At The Spring Store by Acxess Spring, we carry an extensive range of 3/4" OD extension springs in different wire sizes, hook designs, coil lengths, and tension rates — all ready for fast delivery.
How To Measure Your 3/4" Inner Diameter Stock Extension Spring
Your 3/4" (three fourths of an inch) extension spring’s outer diameter plays a major role in the spring’s strength, fit, and mechanical behavior. A 3/4" OD extension spring is perfect for heavy-load applications where maximum tension, cycle life, and durability are critical.
The 3/4" (0.75) OD extension springs we offer are available in multiple variations — including wire thickness, hook types, coil count, and total length — allowing for optimal design flexibility.
All 3/4" OD extension springs are manufactured from premium-quality 302 stainless steel (ASTM A 313) or music wire (ASTM A 228) for excellent performance in demanding, high-cycle 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
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