{"product_id":"pneumatic-push-in-tube-fittings-quick-connectors-4-16mm","title":"Pneumatic Push-In Tube Fittings | Air Line Quick Connectors 4–16mm OD","description":"\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 tube OD size for my pneumatic fitting?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure the outer diameter (OD) of your air tube — not the inner diameter. Common sizes are 4mm (≈5\/32\\u201d), 6mm (≈1\/4\\u201d), 8mm (≈5\/16\\u201d), 10mm (≈3\/8\\u201d), 12mm (≈1\/2\\u201d), 14mm (≈9\/16\\u201d), and 16mm (≈5\/8\\u201d). Select the variant that matches your tube OD exactly for a secure, leak-free push-in connection.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What connector types are available and what do they mean?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This listing includes multiple fitting configurations: PZA (straight union), PK (elbow\/L-shape), PU (union tee), PV (cross\/4-way), PE (bulkhead union), PY (Y-splitter), HVFF (high-flow straight), PM (male straight), and LSA (male elbow). Select the type that matches your pneumatic circuit layout.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What working pressure can these push-in fittings handle?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Push-in pneumatic fittings of this type are generally rated for working pressures up to approximately 150 PSI (10 bar) depending on tube size and material. For safety-critical applications, verify the pressure rating against your system specifications before installation.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these fittings suitable for outdoor or humid environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These fittings are typically made from engineering-grade plastic (such as PA or POM) with stainless steel internal collets, which provides good resistance to moisture and mild corrosion. For prolonged outdoor exposure or chemical environments, contact us to confirm material compatibility.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What tube materials are compatible with these push-in connectors?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These push-in fittings are generally compatible with standard pneumatic tubing including polyurethane (PU), nylon (PA), and polyethylene (PE) air lines. The tube OD must match the selected fitting size. Soft or non-round tubing may not seal correctly — use firm, round-profile tubing for best results.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I release the tube from a push-in fitting?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"To release the tube, depressurize the line first, then press the collet ring (the outer collar) inward toward the fitting body while pulling the tube straight out. Do not twist or yank the tube, as this can damage the collet teeth.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Do I need thread sealant or PTFE tape for these fittings?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For the tube-side push-in connection, no sealant is needed — the collet and O-ring create a seal automatically. For threaded-end variants (such as PM or LSA male connectors), wrapping the male thread with 2–3 layers of PTFE tape before installation is generally recommended to ensure a leak-free thread seal.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003ePneumatic Push-In Tube Fittings — Fast, Tool-Free Air Line Connections for 4–16mm OD Tubing\u003c\/h2\u003e\n    \u003cp\u003eWhether you're building a compressed air circuit for a workshop compressor, wiring up a pneumatic automation system, or repairing a leaking air line on a machine, finding a fitting that actually holds pressure without tools or thread tape on the tube side is the real challenge. These pneumatic push-in quick connector fittings are designed for DIYers, maintenance technicians, and small-shop builders who need reliable, repeatable connections without the hassle.\u003c\/p\u003e\n    \u003cp\u003eEach fitting is sold individually (1 piece per order) and is available in nine connector configurations — straight union (PZA), elbow (PK), union tee (PU), cross\/4-way (PV), bulkhead union (PE), Y-splitter (PY), high-flow straight (HVFF), male straight (PM), and male elbow (LSA) — across tube OD sizes from 4mm (≈5\/32\") to 16mm (≈5\/8\"). The body is constructed from engineering-grade plastic with a stainless steel internal collet and a nitrile or EPDM O-ring for a secure, leak-resistant seal.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include connecting PU, nylon, or PE air tubing in pneumatic control panels, routing compressed air lines in woodworking or fabrication shops, and building or repairing push-to-connect air fittings in automated machinery or conveyor systems.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-compat\"\u003e\n    \u003cspan class=\"hdiy-compat-icon\"\u003eℹ️\u003c\/span\u003e\n    \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for standard pneumatic tubing with OD sizes 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, and 16mm. Compatible with PU, PA (nylon), and PE air lines. Select your tube type and OD size from the variant options above.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These Pneumatic Push-In Quick Connector 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 Push-In Connection\u003c\/strong\u003e — Insert the tube straight in and the stainless steel collet grips it automatically — no wrenches, clamps, or thread tape needed on the tube side.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e9 Connector Configurations\u003c\/strong\u003e — Straight, elbow, tee, cross, bulkhead, Y-splitter, high-flow, male straight, and male elbow types cover virtually every pneumatic circuit layout in one product listing.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eWide Size Range: 4mm–16mm OD\u003c\/strong\u003e — Covers the most common pneumatic tube outer diameters used in workshop compressors, automation lines, and DIY air systems, from 4mm (≈5\/32\") up to 16mm (≈5\/8\").\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e💧\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eO-Ring Sealed for Leak Resistance\u003c\/strong\u003e — An internal O-ring (nitrile or EPDM) combined with the collet grip creates a reliable air-tight seal, reducing the risk of pressure drop in your pneumatic circuit.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e♻️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eReusable \u0026amp; Re-insertable\u003c\/strong\u003e — Press the collet collar to release the tube without damaging the fitting — ideal for reconfiguring air lines during prototyping or system changes.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏭\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eEngineering-Grade Plastic Body\u003c\/strong\u003e — The fitting body is molded from a durable engineering polymer (typically PA or POM) that resists cracking under pressure cycling and holds up in typical workshop and light industrial environments.\u003c\/span\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003e📐 Technical Specifications — Pneumatic Push-In Tube Fittings\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eConnector Types\u003c\/th\u003e\n\u003ctd\u003ePZA (straight union), PK (elbow), PU (union tee), PV (cross\/4-way), PE (bulkhead union), PY (Y-splitter), HVFF (high-flow straight), PM (male straight), LSA (male elbow)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTube OD Sizes\u003c\/th\u003e\n\u003ctd\u003e4mm (≈5\/32\"), 6mm (≈1\/4\"), 8mm (≈5\/16\"), 10mm (≈3\/8\"), 12mm (≈1\/2\"), 14mm (≈9\/16\"), 16mm (≈5\/8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBody Material\u003c\/th\u003e\n\u003ctd\u003eEngineering-grade plastic (typically PA or POM)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCollet Material\u003c\/th\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eSeal Material\u003c\/th\u003e\n\u003ctd\u003eNitrile (NBR) or EPDM O-ring\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 to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCompatible Tube Types\u003c\/th\u003e\n\u003ctd\u003ePU (polyurethane), PA (nylon), PE (polyethylene) pneumatic tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eConnection Method\u003c\/th\u003e\n\u003ctd\u003ePush-in \/ push-to-connect (tool-free tube insertion)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eThread Standard (threaded ends)\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\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 piece (1Pcs)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eOperating Temperature\u003c\/th\u003e\n\u003ctd\u003eGenerally 0°C–60°C (32°F–140°F) for standard variants\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-note\"\u003e\n    \u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e\n    \u003cstrong\u003eNote:\u003c\/strong\u003e Thread dimensions for PM and LSA male-end variants are not listed on this page. If your application requires a specific thread standard (e.g., NPT, BSP, or metric), please contact us before ordering to confirm compatibility.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-faq\"\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I choose the right tube OD size for my pneumatic fitting?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eMeasure the \u003cstrong\u003eouter diameter (OD)\u003c\/strong\u003e of your air tube — not the inner diameter. Common sizes are 4mm (≈5\/32\"), 6mm (≈1\/4\"), 8mm (≈5\/16\"), 10mm (≈3\/8\"), 12mm (≈1\/2\"), 14mm (≈9\/16\"), and 16mm (≈5\/8\"). Select the variant that matches your tube OD exactly for a secure, leak-free push-in connection. Using a caliper is the most reliable way to measure.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat connector types are available and what do they mean?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThis listing includes multiple fitting configurations:\u003c\/p\u003e\n        \u003cul class=\"hdiy-list\"\u003e\n          \u003cli\u003e\n\u003cstrong\u003ePZA\u003c\/strong\u003e — Straight union (connects two tubes in-line)\u003c\/li\u003e\n          \u003cli\u003e\n\u003cstrong\u003ePK\u003c\/strong\u003e — Elbow \/ L-shape (90° direction change)\u003c\/li\u003e\n          \u003cli\u003e\n\u003cstrong\u003ePU\u003c\/strong\u003e — Union tee (splits one line into two, T-shape)\u003c\/li\u003e\n          \u003cli\u003e\n\u003cstrong\u003ePV\u003c\/strong\u003e — Cross \/ 4-way (splits into three directions)\u003c\/li\u003e\n          \u003cli\u003e\n\u003cstrong\u003ePE\u003c\/strong\u003e — Bulkhead union (mounts through a panel)\u003c\/li\u003e\n          \u003cli\u003e\n\u003cstrong\u003ePY\u003c\/strong\u003e — Y-splitter (angled branch)\u003c\/li\u003e\n          \u003cli\u003e\n\u003cstrong\u003eHVFF\u003c\/strong\u003e — High-flow straight union\u003c\/li\u003e\n          \u003cli\u003e\n\u003cstrong\u003ePM\u003c\/strong\u003e — Male straight (tube to male thread)\u003c\/li\u003e\n          \u003cli\u003e\n\u003cstrong\u003eLSA\u003c\/strong\u003e — Male elbow (tube to male thread, 90°)\u003c\/li\u003e\n        \u003c\/ul\u003e\n        \u003cp\u003eSelect the type that matches your pneumatic circuit layout.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat working pressure can these push-in fittings handle?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003ePush-in pneumatic fittings of this type are generally rated for working pressures up to approximately \u003cstrong\u003e150 PSI (10 bar)\u003c\/strong\u003e depending on tube size and material. For safety-critical or high-cycle applications, verify the pressure rating against your system specifications before installation.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these fittings suitable for outdoor or humid environments?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThese fittings are typically made from engineering-grade plastic with stainless steel internal collets, which provides good resistance to moisture and mild corrosion in most workshop conditions. For prolonged outdoor exposure, chemical environments, or food-grade applications, contact us to confirm material compatibility before ordering.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat tube materials are compatible with these push-in connectors?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThese push-in fittings are generally compatible with standard pneumatic tubing including \u003cstrong\u003epolyurethane (PU)\u003c\/strong\u003e, \u003cstrong\u003enylon\/PA\u003c\/strong\u003e, and \u003cstrong\u003epolyethylene (PE)\u003c\/strong\u003e air lines. The tube OD must match the selected fitting size. Soft, flexible, or out-of-round tubing may not seal correctly — use firm, round-profile pneumatic tubing for best results.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I release the tube from a push-in fitting?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eTo release the tube: \u003cstrong\u003edepressurize the line first\u003c\/strong\u003e, then press the collet ring (the outer collar) inward toward the fitting body while pulling the tube straight out. Do not twist or yank the tube, as this can damage the collet teeth and prevent a proper seal on re-insertion.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eDo I need thread sealant or PTFE tape for these fittings?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eFor the tube-side push-in connection, no sealant is needed — the collet and O-ring create the seal automatically. For threaded-end variants (PM male straight or LSA male elbow), wrapping the male thread with \u003cstrong\u003e2–3 layers of PTFE tape\u003c\/strong\u003e before installation is generally recommended to ensure a leak-free thread seal.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I reuse these fittings after removing the tube?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eIn most cases, yes. Push-in fittings are designed to be reusable — the collet mechanism allows the tube to be inserted and released multiple times without replacing the fitting. However, inspect the O-ring and collet teeth for wear after repeated use, especially in high-pressure or high-cycle applications.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-cta\"\u003e\n    🛒 Select your connector type and tube OD size above, then add to cart — ships from our US warehouse.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"PZA \/ 4mm \/ 1Pcs","offer_id":52336042017042,"sku":"FXLxin411-0","price":3.13,"currency_code":"USD","in_stock":true},{"title":"PZA \/ 6mm \/ 1Pcs","offer_id":52336042049810,"sku":"FXLxin411-1","price":3.13,"currency_code":"USD","in_stock":true},{"title":"PZA \/ 8mm \/ 1Pcs","offer_id":52336042082578,"sku":"FXLxin411-2","price":3.26,"currency_code":"USD","in_stock":true},{"title":"PZA \/ 10mm \/ 1Pcs","offer_id":52336042115346,"sku":"FXLxin411-3","price":3.51,"currency_code":"USD","in_stock":true},{"title":"PZA \/ 12mm \/ 1Pcs","offer_id":52336042148114,"sku":"FXLxin411-4","price":4.09,"currency_code":"USD","in_stock":true},{"title":"PK \/ 4mm \/ 1Pcs","offer_id":52336042180882,"sku":"FXLxin411-5","price":3.13,"currency_code":"USD","in_stock":true},{"title":"PK \/ 6mm \/ 1Pcs","offer_id":52336042213650,"sku":"FXLxin411-6","price":3.26,"currency_code":"USD","in_stock":true},{"title":"PK \/ 8mm \/ 1Pcs","offer_id":52336042246418,"sku":"FXLxin411-7","price":3.51,"currency_code":"USD","in_stock":true},{"title":"PK \/ 10mm \/ 1Pcs","offer_id":52336042279186,"sku":"FXLxin411-8","price":4.24,"currency_code":"USD","in_stock":true},{"title":"PK \/ 12mm \/ 1Pcs","offer_id":52336042311954,"sku":"FXLxin411-9","price":4.09,"currency_code":"USD","in_stock":true},{"title":"PU \/ 4mm \/ 1Pcs","offer_id":52336042344722,"sku":"FXLxin411-10","price":2.88,"currency_code":"USD","in_stock":true},{"title":"PU \/ 6mm \/ 1Pcs","offer_id":52336042377490,"sku":"FXLxin411-11","price":3.03,"currency_code":"USD","in_stock":true},{"title":"PU \/ 8mm \/ 1Pcs","offer_id":52336042410258,"sku":"FXLxin411-12","price":3.03,"currency_code":"USD","in_stock":true},{"title":"PU \/ 10mm \/ 1Pcs","offer_id":52336042443026,"sku":"FXLxin411-13","price":3.13,"currency_code":"USD","in_stock":true},{"title":"PU \/ 12mm \/ 1Pcs","offer_id":52336042475794,"sku":"FXLxin411-14","price":3.13,"currency_code":"USD","in_stock":true},{"title":"PU \/ 14mm \/ 1Pcs","offer_id":52336042508562,"sku":"FXLxin411-15","price":3.51,"currency_code":"USD","in_stock":true},{"title":"PU \/ 16mm \/ 1Pcs","offer_id":52336042541330,"sku":"FXLxin411-16","price":3.51,"currency_code":"USD","in_stock":true},{"title":"PV \/ 4mm \/ 1Pcs","offer_id":52336042574098,"sku":"FXLxin411-17","price":2.88,"currency_code":"USD","in_stock":true},{"title":"PV \/ 6mm \/ 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