Made of stainless steel, these springs are more corrosion resistant than steel extension springs. Keep them on hand so you can cut the right length whenever you need it. All have straight-cut ends, which allow you to bend the end coils into hook or loop ends.

As you stretch an extension spring, it gets harder to pull. Minimum load is the amount of force required to start to extend the spring. Spring rate is the amount of force required for every inch of extension.

To determine the spring rate of a cut spring, first multiply the spring’s original length by the spring rate given, then divide the result by the cut length (in inches).

For technical drawings and 3-D models, click on a part number.