{"product_id":"heli-coil-a3585-5cn469-5-16-18-unc-locking-insert-304-ss","title":"Heli-coil A3585-5CN469 5\/16-18 Unc Locking Insert 304 Ss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HELI-COIL A3585-5CN469 is a screw-locking helical coil threaded insert designed to provide a hardened, wear-resistant internal thread in parent materials that require reliable locking performance. Manufactured from Grade 304 stainless steel with a bright finish, this insert accepts 5\/16-18 UNC fasteners and measures 0.469 inches in overall length, corresponding to a 1-1\/2D length-to-diameter ratio. The tangless design eliminates the need for tang break-off after installation, reducing installation time and preventing loose tang debris inside assemblies. It delivers a maximum locking torque of 60 inch-pounds and a minimum break-away torque of 7.5 inch-pounds. Maintenance technicians, machinists, and field service professionals across HVAC, plumbing, and mechanical trades install these inserts to restore or reinforce threaded holes.\u003c\/p\u003e\n\u003cp\u003eThis insert is suited for applications where vibration, repeated fastener cycling, or soft parent materials would otherwise cause thread stripping or loosening. Typical use cases include thread repair in aluminum housings, steel enclosures, and cast components across residential and light commercial mechanical systems. The 304 stainless steel construction resists corrosion in moist or chemically exposed environments. With 6-5\/8 free coils and an outside diameter range of 0.380 to 0.400 inches, the insert provides consistent engagement and load distribution across the full thread length.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eTangless design eliminates post-installation tang removal and prevents debris contamination\u003c\/li\u003e\n  \u003cli\u003eMaximum locking torque of 60 inch-pounds for secure fastener retention under vibration\u003c\/li\u003e\n  \u003cli\u003eMinimum break-away torque of 7.5 inch-pounds ensures detectably positive locking action\u003c\/li\u003e\n  \u003cli\u003eGrade 304 stainless steel construction resists corrosion and withstands repeated thermal cycling\u003c\/li\u003e\n  \u003cli\u003eBright finish with 6-5\/8 free coils for consistent thread engagement across full insert length\u003c\/li\u003e\n  \u003cli\u003eOutside diameter range of 0.380 to 0.400 inches for reliable interference fit in tapped parent holes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style screw-locking insert for 5\/16-18 UNC threaded holes requiring locking performance in parent materials across general mechanical and trade service applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists or qualified trade technicians using a HELI-COIL compatible installation tool matched to the 5\/16-18 UNC thread size. The parent hole must be drilled and tapped to the correct HELI-COIL tap drill size before insert installation. Power down or de-energize any equipment being serviced before drilling or tapping operations begin. The tangless design requires a compatible tangless installation tool and does not require a tang break-off step after seating.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/16-18 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Insert Length\u003c\/strong\u003e: 0.469 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength to Diameter Ratio\u003c\/strong\u003e: 1-1\/2D\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Outside Diameter\u003c\/strong\u003e: 0.380 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Outside Diameter\u003c\/strong\u003e: 0.400 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Free Coils\u003c\/strong\u003e: 6-5\/8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Locking Torque\u003c\/strong\u003e: 60 inch-pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Break-Away Torque\u003c\/strong\u003e: 7.5 inch-pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: 304\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTang\u003c\/strong\u003e: Tangless\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Inserts\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: HELI-COIL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: A3585-5CN469\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELI-COIL","offers":[{"title":"Default Title","offer_id":52101370806578,"sku":"A3585-5CN469","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a8c36543a922cbd99e5f7bddc18b8308.jpg?v=1790069720","url":"https:\/\/voomisupply.com\/products\/heli-coil-a3585-5cn469-5-16-18-unc-locking-insert-304-ss","provider":"Voomi Supply","version":"1.0","type":"link"}