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Selection
Extension Springs are organized in order of increasing diameter and wire size. Note that in each category the spring rate decreases as the length increases.
Unit of Measure

Specifications

Type

 N/A Extension

Material

 N/A Music Wire

Outside Diameter

 N/A 0.75

Wire Diameter

 N/A 0.075

Free Length

 N/A 2.250

Max. Load

 N/A 21.2

Max. Extension

 N/A 3.95

Initial Tension

 N/A 1.9

Spring Rate

 N/A 11.40

Max. Load (SS)

 N/A 18.100

Max. Extension (SS)

 N/A 3.92

Initial Tension (SS)

 N/A 1.6

Spring Rate (SS)

 N/A 9.9