304 Compression Spring Wire Diameter 1mm ,Outer Dia 11mm-20mm, Length 5mm-120mm

Measure the bore or guide pin your spring will seat against. The spring OD should be slightly smaller than the bore ID (typically 0.5–1mm clearance) or slightly larger than the guide pin OD. For free length, select a spring that is 20–30% longer than your required compressed length to stay within the elastic range and avoid coil bind.

Load capacity depends on wire diameter, OD, free length, and number of active coils. A 1mm wire spring in this range typically handles light to moderate loads — generally 0.5 N to 15 N depending on the specific geometry. If you need exact spring rate data for a specific variant, contact us to confirm before ordering.

Yes. 304 stainless steel provides solid resistance to atmospheric corrosion, fresh water, and mild chemical exposure. It is not recommended for prolonged immersion in chloride-rich environments (e.g., seawater) — for those applications, 316 stainless steel is preferred. For most indoor, outdoor, and light industrial uses, 304 performs reliably.

Both packs contain identical springs — the only difference is quantity. The 10-pack is suited for production runs, maintenance stock, or applications requiring multiple springs per assembly. The 5-pack is ideal for prototyping or single-unit repairs where fewer pieces are needed.

Yes. The compact wire diameter and wide length range make these springs well suited for 3D printer extruder tensioners, bed leveling mechanisms, and robotic gripper return springs. Verify the specific OD and free length against your design tolerances before ordering.

Spring rate is determined by wire diameter, OD, and number of active coils. If you need a confirmed spring rate (N/mm) for a specific variant, please contact us with your size selection and we will provide the specification. For general DIY and prototyping use, selecting by OD and free length is typically sufficient.

304 stainless steel is inherently free of restricted substances under RoHS directives (no lead, cadmium, mercury, or hexavalent chromium). These springs are suitable for use in electronics enclosures, PCB retention clips, and similar assemblies. Contact us if you require a formal compliance declaration for your project.