{"product_id":"st-type-straight-through-check-valve-oil-fitting-r1-8-to-m8x1-copper","title":"ST Copper Check Valve Oil Fitting R1\/8 to M8x1 | Lubrication","description":"\u003ch2\u003eST Type Straight-Through Check Valve Oil Lubrication Fitting\u003c\/h2\u003e\n\u003cp\u003eKeep your lubrication systems running smoothly with this precision-engineered \u003cstrong\u003eST Type Straight-Through Check Valve Oil Fitting\u003c\/strong\u003e. Crafted from high-quality copper, this proportional dispenser fitting is designed to regulate and maintain consistent oil flow in lubrication lines — making it an essential component for industrial machinery, pneumatic systems, and mechanical equipment maintenance.\u003c\/p\u003e\n\n\u003cp\u003eWith male thread connections ranging from \u003cstrong\u003eR1\/8 to M8x1\u003c\/strong\u003e, this versatile bushing-type fitting integrates seamlessly into a wide range of tubing gauge setups. Its equal-shape, straight-through design ensures minimal flow resistance while the built-in check valve prevents backflow, protecting your system integrity.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Durable copper construction for excellent corrosion resistance and longevity\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Straight-through (ST) bushing with integrated check valve function\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size:\u003c\/strong\u003e R1\/8 to M8x1 male connection\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax Pressure:\u003c\/strong\u003e \u0026lt;850 kPa — suitable for low-to-medium pressure lubrication systems\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Equal \/ straight-through for unrestricted, proportional flow\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Type:\u003c\/strong\u003e Male thread for secure, leak-resistant installation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Oil lubrication dispensing, tubing gauge lines, and centralized lubrication systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Choose This Fitting?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ Proportional flow control keeps oil distribution consistent and precise\u003c\/li\u003e\n  \u003cli\u003e✅ Check valve function prevents reverse flow and protects downstream components\u003c\/li\u003e\n  \u003cli\u003e✅ Compact copper body withstands industrial operating conditions\u003c\/li\u003e\n  \u003cli\u003e✅ Easy thread-in installation — no special tools required\u003c\/li\u003e\n  \u003cli\u003e✅ Compatible with a variety of standard lubrication and pneumatic tubing setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eST\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eCopper\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eConnection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eMale\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eThread Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eR1\/8 to M8x1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eMax Pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u0026lt;850 kPa\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eShape\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eEqual \/ Straight-Through\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eBushing\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eRelated Products You May Also Need\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/stainless-steel-self-tapping-screws-m2-2-m4-8-phillips-wood-hinge\"\u003e10PCS Stainless Steel Self-Tapping Screws M2.2–M4.8 Phillips\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10pcs-durable-gold-blade-nut-metal-universal-trimmer-accessories-anti-loosening-line-left-hand-thread-replacement-parts-1\"\u003e10pcs Durable Gold Blade Nut Metal Universal Trimmer Accessories\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/12pcs-16mm-momentary-push-button-switch-1no-metal-2-pin-self-reset\"\u003e12pcs 16mm Momentary Push Button Switch 1NO Metal 2-Pin Self-Reset\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the ST type straight-through check valve fitting used for?\u003c\/h4\u003e\n\u003cp\u003eA: This ST type fitting is used in centralized oil lubrication systems to regulate proportional oil flow through tubing lines. The integrated check valve prevents oil from flowing backward, protecting pumps and downstream components in industrial or mechanical applications.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What thread sizes does this copper oil fitting support?\u003c\/h4\u003e\n\u003cp\u003eA: This fitting covers a range from R1\/8 to M8x1 male thread sizes, making it compatible with many standard lubrication and pneumatic tubing gauge configurations used in machinery maintenance.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the maximum pressure this fitting can handle?\u003c\/h4\u003e\n\u003cp\u003eA: This ST type check valve fitting is rated for pressures below 850 kPa, making it well-suited for low-to-medium pressure oil lubrication dispensing systems.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this fitting easy to install?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The male thread connection design allows for straightforward thread-in installation using standard tools, and the equal straight-through shape ensures minimal flow restriction once fitted.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the ST type straight-through check valve fitting used for?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This ST type fitting is used in centralized oil lubrication systems to regulate proportional oil flow through tubing lines. The integrated check valve prevents oil from flowing backward, protecting pumps and downstream components in industrial or mechanical applications.\"}}, {\"@type\": \"Question\", \"name\": \"What thread sizes does this copper oil fitting support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This fitting covers a range from R1\/8 to M8x1 male thread sizes, making it compatible with many standard lubrication and pneumatic tubing gauge configurations used in machinery maintenance.\"}}, {\"@type\": \"Question\", \"name\": \"What is the maximum pressure this fitting can handle?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This ST type check valve fitting is rated for pressures below 850 kPa, making it well-suited for low-to-medium pressure oil lubrication dispensing systems.\"}}, {\"@type\": \"Question\", \"name\": \"Is this fitting easy to install?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The male thread connection design allows for straightforward thread-in installation using standard tools, and the equal straight-through shape ensures minimal flow restriction once fitted.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/68k0rh-yt.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/68k0rh-yt.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"ST Copper Check Valve Oil Fitting R1\/8 to M8x1 | Lubrication\", \"item\": \"https:\/\/68k0rh-yt.myshopify.com\/products\/st-type-straight-through-check-valve-oil-fitting-r1-8-to-m8x1-copper\"}]}\u003c\/script\u003e","brand":"Richie's","offers":[{"title":"ST 5","offer_id":57606133973158,"sku":"32834932736-ST 5","price":7.1,"currency_code":"USD","in_stock":true},{"title":"ST 1","offer_id":57606134005926,"sku":"32834932736-ST 1","price":7.1,"currency_code":"USD","in_stock":true},{"title":"ST 2","offer_id":57606134038694,"sku":"32834932736-ST 2","price":7.1,"currency_code":"USD","in_stock":true},{"title":"ST 3","offer_id":57606134071462,"sku":"32834932736-ST 3","price":7.1,"currency_code":"USD","in_stock":true},{"title":"ST 4","offer_id":57606134104230,"sku":"32834932736-ST 4","price":7.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0785\/2182\/7494\/files\/H913b14027b254bb8a969af8bc5409026N.webp?v=1791728367","url":"https:\/\/richiesmart.com\/products\/st-type-straight-through-check-valve-oil-fitting-r1-8-to-m8x1-copper","provider":"Richie's","version":"1.0","type":"link"}