{"product_id":"heli-coil-a4184-3cn030-screw-locking-insert-m3-x-0-50","title":"Heli-coil A4184-3CN030 Screw-locking Insert M3 X 0.50","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HELI-COIL A4184-3CN030 is a tangless screw-locking helical coil insert designed to create a durable, vibration-resistant threaded hole in a parent material. It accepts an M3 x 0.50 metric coarse fastener and has a 1D length-to-diameter ratio, giving it a 3.00 mm overall installed length. Manufactured from Grade 304 stainless steel with a bright finish, this insert resists corrosion in demanding environments. It is installed without a tang, eliminating the tang-removal step after installation. Maximum locking torque is 0.44 N\/m with a minimum breakaway torque of 0.10 N\/m. Machinists, MRO technicians, and assembly professionals use this insert to repair stripped threads or build new threaded connections in materials that cannot support a standard tapped thread alone.\u003c\/p\u003e\n\u003cp\u003eThis insert is suited for applications where a small-diameter, fine-pitch metric thread must hold under vibration or cyclic loading. Typical install scenarios include precision equipment assemblies, aerospace-grade component repair, electronics enclosures, and light mechanical assemblies requiring a corrosion-resistant thread form. The tangless design is compatible with standard HELI-COIL tangless installation tooling and is used wherever tang removal in a blind hole would be impractical. The minimum outside diameter of 3.80 mm and maximum outside diameter of 4.35 mm define the tap drill and pre-tapped hole requirements for correct fitment.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eTangless design eliminates the tang-break and removal step after installation\u003c\/li\u003e\n  \u003cli\u003eGrade 304 stainless steel construction for corrosion resistance in wet or chemically active environments\u003c\/li\u003e\n  \u003cli\u003eM3 x 0.50 metric coarse thread with 1D length-to-diameter ratio for low-profile thread repair\u003c\/li\u003e\n  \u003cli\u003e3-3\/4 free coils provide consistent locking engagement across the thread length\u003c\/li\u003e\n  \u003cli\u003eMaximum locking torque of 0.44 N\/m controls fastener movement under vibration\u003c\/li\u003e\n  \u003cli\u003eBright finish provides clean visual confirmation of correct seating\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style screw-locking insert for use in any parent material pre-tapped to the M3 x 0.50 HELI-COIL specification, requiring a pre-tapped hole accepting an outside diameter between 3.80 mm and 4.35 mm.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists or assembly technicians using HELI-COIL tangless installation tooling matched to the M3 thread size. The parent material must be pre-tapped with the correct HELI-COIL tap to achieve the proper minor diameter before insert installation. Ensure the work piece is secured and the tapped hole is clean and free of debris before driving the insert. Do not use standard tang-type installation tools with this tangless insert, as doing so will damage the coil.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: M3 x 0.50 Metric Coarse\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Insert Length\u003c\/strong\u003e: 3.00 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength to Diameter Ratio\u003c\/strong\u003e: 1D\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Outside Diameter\u003c\/strong\u003e: 3.80 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Outside Diameter\u003c\/strong\u003e: 4.35 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Free Coils\u003c\/strong\u003e: 3-3\/4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Locking Torque\u003c\/strong\u003e: 0.44 N\/m\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Breakaway Torque\u003c\/strong\u003e: 0.10 N\/m\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\u003eTang\u003c\/strong\u003e: Tangless\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\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: A4184-3CN030\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELI-COIL","offers":[{"title":"Default Title","offer_id":51962314948914,"sku":"A4184-3CN030","price":22.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f469d1cc75cf3d6226d26c30f1c81903.jpg?v=1789947602","url":"https:\/\/voomisupply.com\/products\/heli-coil-a4184-3cn030-screw-locking-insert-m3-x-0-50","provider":"Voomi Supply","version":"1.0","type":"link"}