Compression Springs Wire Dia 1.8mm OD 13-15mm L 10-50mm 304 Stainless Steel

Measure the bore or spring seat inner diameter — your spring's OD should be 0.5–1mm smaller than the bore for a smooth sliding fit. For free length, measure the uncompressed gap the spring needs to fill, then add 20–30% to allow for preload. Use the SIZE (CSxODxL) selector above to pick the closest match from our 13mm, 14mm, and 15mm OD options in lengths from 10mm to 50mm.

304 stainless steel wire used in compression springs typically has a tensile strength of approximately 1,300–1,900 MPa depending on wire diameter and temper. For 1.8mm wire, expect values in the mid-range of this band. This provides solid resistance to permanent set under moderate loads, making these springs suitable for light-to-medium duty cycling applications.

Yes. 304 stainless steel forms a self-repairing passive oxide layer that resists rust and surface corrosion in most outdoor, humid, and mildly saline conditions. They are not recommended for prolonged immersion in chlorinated water or strong acid/alkali environments — for those, 316 stainless steel would be a better choice. For typical outdoor DIY, garden equipment, or light marine use, 304 performs reliably.

Many 3D printers use bed leveling springs with OD around 8–15mm and lengths of 10–25mm. The 13mm or 14mm OD variants in 10–20mm lengths are commonly compatible with popular FDM printer beds. Check your printer's spring seat diameter and screw clearance before ordering. The 1.8mm wire diameter provides a firmer spring rate than lighter 0.8–1.2mm wire springs, which can improve bed stability.

Yes, these springs are well-suited for valve return, plunger, and push-button mechanisms where a consistent return force is needed. Select the OD that fits your valve bore with appropriate clearance, and choose a free length that provides the desired preload when compressed to the installed height. For fluid systems, the 304 stainless material resists most water-based and mild chemical media.

If you need springs for a single repair or prototype, the 5-piece or 10-piece pack is the most cost-effective entry point. For workshop stocking, ongoing production runs, or projects requiring multiple identical springs (such as multi-point bed leveling or multi-valve assemblies), the 25–60 piece packs offer better per-unit value. Select your size first, then choose the quantity that matches your project scope.

The outer diameter determines which bore or spring seat the spring will fit into. A 13mm OD spring fits a bore of approximately 13.5–14.5mm; a 14mm OD fits ~14.5–15.5mm; and a 15mm OD fits ~15.5–16.5mm. All three share the same 1.8mm wire diameter, so the spring rate will vary slightly between sizes due to differences in mean coil diameter. Choose based on your bore measurement first, then verify the length range meets your travel requirements.