{"product_id":"stainless-steel-straight-push-in-pneumatic-fittings-4mm-16mm","title":"Stainless Steel Straight Push-in Pneumatic Fittings | 4mm to 16mm","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003c!-- ① OVERVIEW --\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eStainless Steel Push-in Pneumatic Fittings — Instant, Leak-Free Tube Connections\u003c\/h2\u003e\n\u003cp\u003eWhen a leaking air line slows down your pneumatic system — whether on a compressor, automation rig, or workshop tool — the last thing you want is a fitting that corrodes, loosens, or requires special tools to swap out. These stainless steel straight push-in pneumatic fittings are built for DIYers, machinists, and maintenance technicians who need a fast, reliable connection they can trust.\u003c\/p\u003e\n\u003cp\u003eEach fitting is machined from stainless steel with a push-in collet mechanism that grips semi-rigid pneumatic tubing instantly upon insertion. Available in seven tube outer diameter sizes — 4mm (≈5\/32\"), 6mm (≈1\/4\"), 8mm (≈5\/16\"), 10mm (≈3\/8\"), 12mm (≈15\/32\"), 14mm (≈9\/16\"), and 16mm (≈5\/8\") — and sold in quantities of 1, 2, or 5 pieces per order to match your project scale.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include connecting PU or nylon air lines on workshop compressors, building compact pneumatic control circuits for automation panels, and replacing corroded brass fittings in outdoor or humid environments where stainless steel push-in tube fittings for air lines outperform standard materials.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- ② COMPATIBILITY BAR --\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔗\u003c\/span\u003e Compatible with semi-rigid PU, nylon (PA), and polyethylene (PE) pneumatic tubing matching the selected outer diameter. Not recommended for soft silicone or braided hose. Verify tubing OD before ordering.\u003c\/div\u003e\n\u003c!-- ③ KEY FEATURES --\u003e\n\u003ch2\u003e✅ Key Features of These Stainless Steel Push-in Pneumatic Fittings\u003c\/h2\u003e\n\u003cul class=\"hdiy-features\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eTool-Free Instant Connection\u003c\/strong\u003e — Push the tube straight in until it seats; the internal collet locks it in place immediately, cutting installation time on pneumatic hose push-in connectors to seconds.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🦾\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eStainless Steel Construction\u003c\/strong\u003e — The fitting body resists rust, oxidation, and mild chemical exposure — a clear advantage over zinc or brass in outdoor, humid, or industrial environments.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eSeven Sizes in One Listing\u003c\/strong\u003e — From 4mm to 16mm OD, covering the most common pneumatic tube sizes used in workshop and light industrial applications without ordering from multiple suppliers.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔒\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eSecure Collet Grip\u003c\/strong\u003e — The multi-tooth collet design grips the tube circumferentially, maintaining a leak-resistant seal even under vibration or pressure cycling typical of air compressor lines.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eReleasable Without Tools\u003c\/strong\u003e — Depress the collet ring and pull the tube straight out for quick reconfiguration — useful when prototyping pneumatic circuits or rerouting air lines during equipment upgrades.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eFlexible Quantity Options\u003c\/strong\u003e — Order 1, 2, or 5 pieces per size so you can buy exactly what a single repair needs or stock a small supply for ongoing maintenance without overpaying for bulk packs.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- ④ TECHNICAL SPECIFICATIONS --\u003e\n\u003ch2\u003e📐 Technical Specifications — Straight Push-in Pneumatic Fittings\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eFitting Type\u003c\/th\u003e\n\u003ctd\u003eStraight push-in (tube-to-tube \/ tube-to-port)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Tube OD Sizes\u003c\/th\u003e\n\u003ctd\u003e4mm (≈5\/32\"), 6mm (≈1\/4\"), 8mm (≈5\/16\"), 10mm (≈3\/8\"), 12mm (≈15\/32\"), 14mm (≈9\/16\"), 16mm (≈5\/8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Tubing Types\u003c\/th\u003e\n\u003ctd\u003ePU, nylon (PA), polyethylene (PE) semi-rigid pneumatic tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWorking Pressure\u003c\/th\u003e\n\u003ctd\u003eTypically up to 150 PSI (≈10 bar) — see variant options or contact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWorking Temperature\u003c\/th\u003e\n\u003ctd\u003eSee variant options or contact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConnection Method\u003c\/th\u003e\n\u003ctd\u003ePush-in collet (tool-free insertion; depress collet to release)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread (Port End)\u003c\/th\u003e\n\u003ctd\u003eSee variant options or contact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eNatural stainless steel (no coating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 Pcs \/ 2 Pcs \/ 5 Pcs (select above)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eSee variant options or contact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-note\"\u003e\n\u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e Specifications such as working pressure, temperature range, and port thread standard vary by size. If your application has strict requirements, please contact us before ordering to confirm the exact spec for your chosen size.\u003c\/div\u003e\n\u003c!-- ⑤ FAQ --\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right size push-in fitting for my air line?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMatch the fitting size to your tubing's \u003cstrong\u003eouter diameter (OD)\u003c\/strong\u003e, not the inner diameter. For example, a 6mm fitting accepts tubing with a 6mm OD. If you're working with imperial tubing, 1\/4\" OD is approximately 6.35mm — in most cases a 6mm fitting will work, but always measure your tubing with calipers before ordering. Common conversions: 4mm ≈ 5\/32\", 8mm ≈ 5\/16\", 10mm ≈ 3\/8\", 12mm ≈ 15\/32\".\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat working pressure can these fittings handle?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eStainless steel push-in fittings of this type typically handle working pressures up to \u003cstrong\u003e150 PSI (approximately 10 bar)\u003c\/strong\u003e at standard ambient temperatures. Actual rated pressure may vary by size — contact us to confirm the spec for your specific size before use in high-pressure applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these fittings suitable for outdoor or corrosive environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. Stainless steel construction provides significantly better corrosion resistance than standard brass or zinc fittings, making these generally suitable for outdoor, humid, or mildly corrosive environments. For highly aggressive chemical exposure or salt spray applications, confirm material compatibility with your specific media before installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat thread standard do these fittings use on the body end?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese are straight push-in fittings — the push-in collet end accepts the tube OD directly with no threading required on the tube side. If your application requires a specific threaded port end (e.g., NPT, BSP, metric), please contact us to confirm compatibility before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I release the tubing from a push-in fitting?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eFirst, \u003cstrong\u003edepressurize the air line completely\u003c\/strong\u003e. Then press the collet ring inward toward the fitting body while simultaneously pulling the tube straight out. Avoid twisting the tube during removal — this can damage the collet teeth and compromise the seal on reinstallation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat types of tubing are compatible with these fittings?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese fittings are generally compatible with semi-rigid \u003cstrong\u003epolyurethane (PU), nylon (PA), and polyethylene (PE)\u003c\/strong\u003e pneumatic tubing with the matching outer diameter. Soft silicone tubing or braided hose is typically not compatible with push-in collet designs, as the collet requires a firm tube wall to grip securely.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShould I buy 1Pcs, 2Pcs, or 5Pcs?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eFor a single repair or one-off connection, \u003cstrong\u003e1Pcs\u003c\/strong\u003e is sufficient. If you're building a small pneumatic circuit with multiple connection points, \u003cstrong\u003e2Pcs or 5Pcs\u003c\/strong\u003e offers a better per-unit value and keeps spares on hand for future maintenance — particularly useful for workshop setups where fittings occasionally need replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these fittings with a standard shop air compressor?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eIn most cases, yes. Standard shop compressors typically operate at 90–120 PSI, which falls within the generally rated working pressure range for stainless steel push-in fittings of this type. Ensure your tubing OD matches the selected fitting size and that all connections are fully seated before pressurizing the line.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c!-- ⑥ CTA BAR --\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your size and quantity above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"4mm \/ 1Pcs","offer_id":52336733880594,"sku":"PENG017918x1","price":3.25,"currency_code":"USD","in_stock":true},{"title":"6mm \/ 1Pcs","offer_id":52336733913362,"sku":"PENG017919x1","price":3.25,"currency_code":"USD","in_stock":true},{"title":"8mm \/ 1Pcs","offer_id":52336733946130,"sku":"PENG017920x1","price":3.52,"currency_code":"USD","in_stock":true},{"title":"10mm \/ 1Pcs","offer_id":52336733978898,"sku":"PENG017921x1","price":3.6,"currency_code":"USD","in_stock":true},{"title":"12mm \/ 1Pcs","offer_id":52336734011666,"sku":"PENG017922x1","price":4.07,"currency_code":"USD","in_stock":true},{"title":"14mm \/ 1Pcs","offer_id":52336734044434,"sku":"PENG017923x1","price":4.2,"currency_code":"USD","in_stock":true},{"title":"16mm \/ 1Pcs","offer_id":52336734077202,"sku":"PENG017924x1","price":4.47,"currency_code":"USD","in_stock":true},{"title":"4mm \/ 2Pcs","offer_id":52336734109970,"sku":"PENG017918x2","price":5.02,"currency_code":"USD","in_stock":true},{"title":"6mm \/ 2Pcs","offer_id":52336734142738,"sku":"PENG017919x2","price":4.83,"currency_code":"USD","in_stock":true},{"title":"8mm \/ 2Pcs","offer_id":52336734175506,"sku":"PENG017920x2","price":5.92,"currency_code":"USD","in_stock":true},{"title":"10mm \/ 2Pcs","offer_id":52336734208274,"sku":"PENG017921x2","price":6.38,"currency_code":"USD","in_stock":true},{"title":"12mm \/ 2Pcs","offer_id":52336734241042,"sku":"PENG017922x2","price":7.28,"currency_code":"USD","in_stock":true},{"title":"14mm \/ 2Pcs","offer_id":52336734273810,"sku":"PENG017923x2","price":7.47,"currency_code":"USD","in_stock":true},{"title":"16mm \/ 2Pcs","offer_id":52336734306578,"sku":"PENG017924x2","price":8.09,"currency_code":"USD","in_stock":true},{"title":"4mm \/ 5Pcs","offer_id":52336734339346,"sku":"PENG017918x5","price":11.22,"currency_code":"USD","in_stock":true},{"title":"6mm \/ 5Pcs","offer_id":52336734372114,"sku":"PENG017919x5","price":10.46,"currency_code":"USD","in_stock":true},{"title":"8mm \/ 5Pcs","offer_id":52336734404882,"sku":"PENG017920x5","price":13.4,"currency_code":"USD","in_stock":true},{"title":"10mm \/ 5Pcs","offer_id":52336734437650,"sku":"PENG017921x5","price":14.48,"currency_code":"USD","in_stock":true},{"title":"12mm \/ 5Pcs","offer_id":52336734470418,"sku":"PENG017922x5","price":16.85,"currency_code":"USD","in_stock":true},{"title":"14mm \/ 5Pcs","offer_id":52336734503186,"sku":"PENG017923x5","price":17.34,"currency_code":"USD","in_stock":true},{"title":"16mm \/ 5Pcs","offer_id":52336734535954,"sku":"PENG017924x5","price":18.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of10_93a188ac-c7d7-40e9-adff-110572a11f1f.jpg?v=1781156381","url":"https:\/\/homediyer.com\/de\/products\/stainless-steel-straight-push-in-pneumatic-fittings-4mm-16mm","provider":"HomeDIYer","version":"1.0","type":"link"}