{"product_id":"1mm-coarse-304-stainless-steel-long-compression-spring-305mm","title":"1mm Coarse 304 Stainless Steel Long Compression Spring Length 305mm Fasteners","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e1mm Wire 304 Stainless Steel Long Compression Spring — Reliable Force in Every Coil\u003c\/h2\u003e\n\u003cp\u003eWhen a project demands a spring that holds its shape under repeated load cycles, a flimsy carbon-steel coil is the last thing you want. Engineers, robotics builders, and hands-on DIYers who need a dependable 1mm coarse compression spring in a 305mm extended length will find this 304 stainless steel option delivers consistent push-back force without the rust risk that plagues uncoated alternatives.\u003c\/p\u003e\n\u003cp\u003eEach spring is wound from 1mm diameter 304 stainless steel wire into a cylindrical coil body with an overall length of 305mm (approximately 12 inches). Outer diameter ranges from 6mm to 16mm (roughly 0.24\" to 0.63\") depending on the selected size variant, with a coarse pitch that provides a longer free travel range per unit of compression. The open-end coil construction is standard for general-purpose compression applications.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include custom actuator return mechanisms in robotics and automation rigs, tension-balancing assemblies in 3D printer Z-axis carriages, and replacement springs for industrial jigs, fixtures, and hand tools where a 305mm long compression spring for DIY projects is required. The 304 alloy also makes these springs a practical choice for outdoor or mildly corrosive environments.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔩\u003c\/span\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Suitable for spring guides, mandrels, or bores sized to match the selected outer diameter. Verify inner diameter clearance against your guide rod before ordering. Mix-and-match size and quantity variants to suit your build.\n\u003c\/div\u003e\n\n\u003ch2\u003e✅ Key Features of These 304 Stainless Steel Long Compression Springs\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🧲\u003c\/span\u003e\n\u003cstrong\u003e304 Stainless Steel Wire\u003c\/strong\u003e\n\u003cp\u003eWound from 304-grade stainless steel, offering solid corrosion resistance in humid, wet, or mildly acidic environments without surface coatings that can flake or wear off.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\n\u003cstrong\u003e305mm Extended Free Length\u003c\/strong\u003e\n\u003cp\u003eThe 305mm (≈12\") free length gives you generous working travel, making these springs well-suited for long-stroke mechanisms, counterbalance systems, and extended actuator returns.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\n\u003cstrong\u003e1mm Wire Diameter, Coarse Pitch\u003c\/strong\u003e\n\u003cp\u003eThe 1mm wire gauge paired with a coarse coil pitch delivers a lighter spring rate ideal for low-to-medium load applications where smooth, progressive compression is needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n\u003cstrong\u003eMultiple OD Options (6–16mm)\u003c\/strong\u003e\n\u003cp\u003eSix outer diameter variants — 6, 8, 10, 12, 14, and 16mm — let you match the spring to your guide bore or housing without custom fabrication.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\n\u003cstrong\u003eOpen-End Coil Construction\u003c\/strong\u003e\n\u003cp\u003eStandard open ends allow the spring to seat naturally against flat surfaces or inside recessed pockets, compatible with most off-the-shelf spring retainers and caps.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛠️\u003c\/span\u003e\n\u003cstrong\u003eBroad Application Range\u003c\/strong\u003e\n\u003cp\u003eFrom robotics and automation to 3D printing, hand tools, and general mechanical assemblies — these stainless steel compression springs for DIY and light industrial use cover a wide range of everyday engineering needs.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003ch2\u003e📐 Technical Specifications — Compression Spring\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eWire Diameter\u003c\/th\u003e\n\u003ctd\u003e1mm (0.039\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFree Length\u003c\/th\u003e\n\u003ctd\u003e305mm (≈12.0\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter\u003c\/th\u003e\n\u003ctd\u003e6 \/ 8 \/ 10 \/ 12 \/ 14 \/ 16mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Type\u003c\/th\u003e\n\u003ctd\u003eCoarse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEnd Type\u003c\/th\u003e\n\u003ctd\u003eOpen ends\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e304 Stainless Steel\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\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eNatural (uncoated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 PCS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right outer diameter for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure the inner diameter of your spring housing or the outer diameter of your guide rod. For a housing fit, the spring OD should be slightly smaller than the bore. For a guide rod fit, the spring inner diameter (OD minus 2× wire diameter) should be slightly larger than the rod. Select the variant whose OD gives you the appropriate clearance — typically 0.5–1mm of play on each side.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat load can a 1mm wire compression spring handle?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eA 1mm wire diameter spring is designed for light-to-medium loads. The exact spring rate depends on the outer diameter and number of active coils. These springs are well-suited for return mechanisms, counterbalances, and light actuator applications rather than heavy-duty clamping or press-fit uses. If you need exact load data for your variant, contact us to confirm.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eIs 304 stainless steel suitable for outdoor or wet environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. 304 stainless steel provides good resistance to atmospheric corrosion, moisture, and mild chemical exposure. It is a practical choice for outdoor fixtures, garden equipment, and marine-adjacent applications where light corrosion resistance is needed. For highly saline or strongly acidic environments, 316 stainless steel would offer superior protection.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eCan I cut this spring to a shorter length?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eCompression springs can be cut shorter using a rotary tool or spring cutter, but cutting changes the spring rate and may leave sharp ends that require grinding. If you need a specific shorter length, it is generally better to select a spring closer to your target free length. Contact us if you need guidance on available shorter options.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eAre these springs compatible with 3D printer Z-axis or bed-leveling assemblies?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes, the 305mm long compression spring is commonly used in custom Z-axis counterbalance rigs and extended bed-leveling setups on larger-format 3D printers. Select the OD variant that matches your guide rod or spring pocket. The coarse pitch provides smooth, progressive travel suitable for these precision applications.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between coarse pitch and fine pitch compression springs?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eCoarse pitch springs have wider spacing between coils, which gives a longer free travel range and a lower spring rate for a given wire diameter and OD. Fine pitch springs have tighter coil spacing, resulting in a higher spring rate and shorter travel. For long-stroke, low-force applications — such as return mechanisms or counterbalances — coarse pitch is typically the better choice.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eHow many springs do I receive per order?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eEach order of the standard listing includes 1 PCS (one spring). If you need multiple pieces, simply increase the order quantity at checkout or contact us about bulk pricing for larger quantities.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-cta\"\u003e\n🛒 Select your Size(mm) above, then add to cart.\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose the right outer diameter for my application?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure the inner diameter of your spring housing or the outer diameter of your guide rod. For a housing fit, the spring OD should be slightly smaller than the bore. For a guide rod fit, the spring inner diameter (OD minus 2x wire diameter) should be slightly larger than the rod. Select the variant whose OD gives you the appropriate clearance — typically 0.5–1mm of play on each side.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What load can a 1mm wire compression spring handle?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A 1mm wire diameter spring is designed for light-to-medium loads. The exact spring rate depends on the outer diameter and number of active coils. These springs are well-suited for return mechanisms, counterbalances, and light actuator applications. Contact us to confirm exact load data for your variant.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is 304 stainless steel suitable for outdoor or wet environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. 304 stainless steel provides good resistance to atmospheric corrosion, moisture, and mild chemical exposure. It is a practical choice for outdoor fixtures, garden equipment, and marine-adjacent applications. For highly saline or strongly acidic environments, 316 stainless steel would offer superior protection.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I cut this spring to a shorter length?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Compression springs can be cut shorter using a rotary tool or spring cutter, but cutting changes the spring rate and may leave sharp ends that require grinding. If you need a specific shorter length, it is generally better to select a spring closer to your target free length.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these springs compatible with 3D printer Z-axis or bed-leveling assemblies?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the 305mm long compression spring is commonly used in custom Z-axis counterbalance rigs and extended bed-leveling setups on larger-format 3D printers. Select the OD variant that matches your guide rod or spring pocket.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between coarse pitch and fine pitch compression springs?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Coarse pitch springs have wider spacing between coils, giving a longer free travel range and a lower spring rate. Fine pitch springs have tighter coil spacing, resulting in a higher spring rate and shorter travel. For long-stroke, low-force applications, coarse pitch is typically the better choice.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How many springs do I receive per order?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Each order of the standard listing includes 1 PCS (one spring). If you need multiple pieces, simply increase the order quantity at checkout or contact us about bulk pricing for larger quantities.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"1*6*305mm \/ 1","offer_id":52450584559890,"sku":"QLMHK-KCSJ2351x1","price":7.81,"currency_code":"USD","in_stock":true},{"title":"1*8*305mm \/ 1","offer_id":52450584592658,"sku":"QLMHK-KCSJ2352x1","price":8.17,"currency_code":"USD","in_stock":true},{"title":"1*10*305mm \/ 1","offer_id":52450584625426,"sku":"QLMHK-KCSJ2353x1","price":8.17,"currency_code":"USD","in_stock":true},{"title":"1*12*305mm \/ 1","offer_id":52450584658194,"sku":"QLMHK-KCSJ2354x1","price":8.65,"currency_code":"USD","in_stock":true},{"title":"1*14*305mm \/ 1","offer_id":52450584690962,"sku":"QLMHK-KCSJ2355x1","price":8.99,"currency_code":"USD","in_stock":true},{"title":"1*16*305mm \/ 1","offer_id":52450584723730,"sku":"QLMHK-KCSJ2356x1","price":9.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of12_778a3836-651d-4c52-8cad-1020033d7fe1.jpg?v=1783960740","url":"https:\/\/homediyer.com\/products\/1mm-coarse-304-stainless-steel-long-compression-spring-305mm","provider":"HomeDIYer","version":"1.0","type":"link"}