{"product_id":"miniature-a2-stainless-steel-compression-springs-10pcs","title":"10Pcs Stainless Steel A2 Compression Pressure Springs Miniature Wire Dia 0.1mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eMiniature A2 Stainless Steel Compression Springs — Precision Force for Tight Spaces\u003c\/h2\u003e\n\u003cp\u003eWhen your mechanism demands reliable return force in a space measured in millimeters, an undersized or poorly toleranced spring becomes the weakest link in the entire assembly. Engineers, hobbyists, and precision instrument makers who work with micro-scale mechanisms need miniature compression pressure springs that hold their rated geometry under repeated cycling without corroding or fatiguing prematurely.\u003c\/p\u003e\n\u003cp\u003eEach pack contains 10 miniature compression springs manufactured from A2 stainless steel (austenitic, equivalent to 304-grade). Wire diameter ranges from 0.1 mm to 0.15 mm (approx. 0.004–0.006 in), outer diameter from 0.8 mm to 1.5 mm (approx. 0.031–0.059 in), and free length from 5 mm to 25 mm (approx. 0.20–0.98 in) depending on the variant selected. The close-wound coil geometry provides consistent spring rate across the compression stroke.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include miniature camera shutter mechanisms requiring sub-millimeter return springs, precision pen and stylus clip assemblies where a 1 mm OD compression spring for pen mechanisms fits without modification, and micro-robotics or sensor housings where a stainless steel miniature coil spring for electronics must resist moisture and mild chemical exposure over thousands of cycles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔩\u003c\/span\u003e Compatible with precision instrument housings, micro-robotics frames, pen\/stylus assemblies, sensor enclosures, and any application requiring an OD of 0.8–1.5 mm and free length of 5–25 mm.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Miniature A2 Stainless Steel Compression Springs\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🦾\u003c\/span\u003e\u003cstrong\u003eA2 Stainless Steel Construction\u003c\/strong\u003e — Austenitic stainless alloy delivers inherent corrosion resistance in humid, mildly acidic, or outdoor environments without surface coatings that could flake and contaminate sensitive assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eMicro-Scale Dimensional Range\u003c\/strong\u003e — Wire diameters of 0.1 mm and 0.15 mm paired with outer diameters from 0.8 mm to 1.5 mm cover the most common miniature spring sizes used in precision instruments and consumer electronics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cstrong\u003eSeven Free-Length Options (5–25 mm)\u003c\/strong\u003e — Select the exact free length your design requires rather than cutting or shimming a longer spring, preserving the intended spring rate and load characteristics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eConsistent Coil Geometry\u003c\/strong\u003e — Close-wound helical coil maintains uniform pitch and outer diameter along the full body length, ensuring predictable deflection and avoiding lateral buckling in guided bores.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cstrong\u003e10-Piece Pack for Prototyping and Repair\u003c\/strong\u003e — A quantity of 10 per pack supports iterative prototyping, replacement stock for production lines, or multi-axis assemblies that require matched spring sets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cstrong\u003eBroad Application Compatibility\u003c\/strong\u003e — Suitable for use as a miniature return spring in actuators, a compression spring in pen clip mechanisms, a preload spring in optical mounts, and similar precision sub-assemblies.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Miniature Compression Springs\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eA2 Stainless Steel (Austenitic \/ 304-equivalent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSpring Type\u003c\/th\u003e\n\u003ctd\u003eCompression (Helical Coil)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWire Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options (0.1 mm \/ 0.15 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (OD)\u003c\/th\u003e\n\u003ctd\u003eSee variant options (0.8 mm – 1.5 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFree Length\u003c\/th\u003e\n\u003ctd\u003eSee variant options (5 mm – 25 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Pack\u003c\/th\u003e\n\u003ctd\u003e10 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCoil Direction\u003c\/th\u003e\n\u003ctd\u003eRight-hand (typical; contact us to confirm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEnd Type\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eNatural (no coating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCorrosion Resistance\u003c\/th\u003e\n\u003ctd\u003eGood — suitable for humid and mildly corrosive environments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically –20 °C to +300 °C (–4 °F to +572 °F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSpring Rate\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right wire diameter — 0.1 mm or 0.15 mm?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eWire diameter directly affects spring rate and load capacity. The 0.1 mm wire produces a softer spring with lower force at a given deflection, suitable for very light-load applications such as stylus clips or sensor contacts. The 0.15 mm wire is stiffer and handles slightly higher loads. If your design specifies a target load at a defined compressed length, calculate the required spring rate and select the wire diameter that matches. When in doubt, order both and test — the 10-piece pack makes this practical.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat outer diameter should I select for my bore or housing?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe spring's outer diameter should be slightly smaller than the inner diameter of the bore or housing it sits in — typically 0.05–0.1 mm clearance on each side. For a guided pin, the inner diameter of the spring (OD minus twice the wire diameter) should be slightly larger than the pin. Available ODs range from 0.8 mm to 1.5 mm, covering most miniature precision housings. Measure your bore with a calibrated micrometer before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong are these springs — what load can they handle?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAt this micro scale (wire dia 0.1–0.15 mm, OD 0.8–1.5 mm), the springs are designed for light-duty precision applications rather than heavy mechanical loads. Typical working loads range from a few grams-force to tens of grams-force depending on the specific wire diameter, OD, and free length combination. For exact load-deflection data for a specific variant, please contact us with your variant selection and we will provide the spring rate estimate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these springs corrosion-resistant enough for outdoor or humid environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. A2 stainless steel (austenitic grade, 304-equivalent) provides good resistance to atmospheric corrosion, fresh water, and mild chemical exposure. It is not recommended for prolonged immersion in chloride-rich environments such as seawater or swimming pool water, where A4 (316-grade) stainless would be more appropriate. For indoor precision instruments, electronics, and general mechanical assemblies, A2 performs reliably without surface coatings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these springs in electronics or sensitive sensor assemblies?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The natural (uncoated) A2 stainless steel surface does not introduce plating chemicals or organic coatings that could outgas or contaminate sensitive optical or electronic components. The material is non-magnetic in its annealed state, which is beneficial in magnetically sensitive environments. Always verify the specific magnetic permeability requirement of your application, as cold-working during forming can induce slight magnetism in austenitic stainless.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat free length should I order for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eFree length is the uncompressed length of the spring. Your design's working length (compressed length under load) plus the required deflection equals the minimum free length needed. Add a safety margin of 10–20% to avoid coil bind. Available free lengths are 5, 8, 10, 12, 15, 20, and 25 mm. If your required free length falls between two options, select the next longer size and adjust your assembly's spring seat depth accordingly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre the 10 springs in each pack matched to the same specification?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. All 10 springs in a single pack share the same wire diameter, outer diameter, and free length as specified by the variant you select. They are produced from the same material batch and coiling run, making them suitable for matched-set applications such as multi-axis sensor preloads or parallel spring arrays where consistent force distribution is important.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Wire Diameter, Outer Diameter, and Length above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"0.1mm \/ 0.8mm \/ 5mm","offer_id":52449574387986,"sku":"BGMDLWJ08622x1","price":8.4,"currency_code":"USD","in_stock":true},{"title":"0.1mm \/ 0.8mm \/ 8mm","offer_id":52449574420754,"sku":"BGMDLWJ08623x1","price":8.4,"currency_code":"USD","in_stock":true},{"title":"0.1mm \/ 0.8mm \/ 10mm","offer_id":52449574453522,"sku":"BGMDLWJ08624x1","price":8.4,"currency_code":"USD","in_stock":true},{"title":"0.1mm \/ 0.8mm \/ 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