Compression Spring Stainles Steel 0.7mm 0.8mm Wire Dia 6-14mm Diameter 10-305mm

Measure the inner diameter of your spring pocket or the outer diameter of your guide rod. For a pocket, the spring OD should be 0.5–1 mm smaller than the pocket ID to allow free movement. For a guide rod, the spring ID (OD minus twice the wire diameter) should be 0.5–1 mm larger than the rod OD. Use the variant selector to match these dimensions.

A thicker wire (0.8 mm) produces a stiffer spring with a higher spring rate and load capacity for the same coil count and diameter. Choose 0.7 mm wire for lighter return-force applications such as pen mechanisms or small latches, and 0.8 mm wire where you need more resistance, such as valve seats or heavier actuator returns.

Yes. Stainless steel provides good resistance to atmospheric moisture, light rain exposure, and humid indoor environments. For continuous immersion in salt water or aggressive chemicals, verify the specific stainless alloy grade meets your requirements, as performance can vary by environment severity.

These springs are well-suited for light-duty electronic assemblies, stylus mechanisms, and small instrument components. The closed and ground ends provide stable seating, and the consistent wire diameter ensures repeatable deflection. For safety-critical or high-cycle fatigue applications, always validate with your own testing.

Free length is the uncompressed length of the spring. Determine your working length (the length when installed under load) and add the required deflection to get the minimum free length needed. For example, if your pocket is 20 mm deep and you need 5 mm of travel, select a free length of at least 25 mm. Available lengths range from 5 mm to 305 mm in this listing.

For initial prototyping or testing a single mechanism, the 1-piece or 2-piece packs let you validate fit and spring rate without committing to larger quantities. Once you confirm the correct variant, the 5-piece or 10-piece packs offer better per-unit value for small-batch production runs or keeping spares on hand.

Yes. These springs feature closed and ground ends, meaning the terminal coils are tightly wound and the contact faces are ground flat. This ensures the spring sits perpendicular to its axis, minimizing side-load and improving alignment in guided spring pockets or on guide rods.