21-32 Outer Diameter
21/32" (0.65625) Inch Outer Diameter Standard Extension Springs
Definition of 21/32" Outer Diameter Extension Springs:
A 21/32" (twenty-one thirty-seconds of an inch) outer diameter extension spring has an outer diameter of 0.65625 inches. This size is ideal for heavy-duty or high-load tension applications that require a strong, durable spring. Common applications include machinery, agricultural equipment, automotive components, and large mechanical systems.
At The Spring Store by Acxess Spring, we carry a broad inventory of 21/32" OD extension springs in various lengths, hook styles, wire diameters, and load capacities — ready to ship.
How To Measure Your 21/32" Inner Diameter Stock Extension Spring




Your 21/32" (twenty-one thirty-seconds of an inch) extension spring’s outer diameter plays a crucial role in how the spring fits and performs under stress. A 21/32" OD extension spring is ideal for systems where high tension and long cycle life are required.
The 21/32" (0.65625) OD springs available at Acxess Spring come in multiple configurations — including wire thickness, number of coils, hook style, and body length — all of which influence the spring’s load capacity, flexibility, and durability.
All our 21/32" OD extension springs are made from high-quality materials such as 302 stainless steel (ASTM A 313) and music wire (ASTM A 228) to provide maximum resistance to corrosion, fatigue, and repeated stress.
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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