{"product_id":"heli-coil-a4184-12cn240-m12-x-1-75-screw-locking-insert","title":"Heli-coil A4184-12CN240 M12 X 1.75 Screw-locking Insert","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HELI-COIL A4184-12CN240 is a tangless screw-locking threaded insert designed to create a durable, vibration-resistant internal thread in a parent material. The insert is manufactured from Grade 304 stainless steel with a bright finish, making it suited for corrosive environments where thread strength and locking performance are required. It accepts an M12 x 1.75 metric coarse thread and has an overall length of 24 millimeters, corresponding to a 2D length-to-diameter ratio. With 11-1\/2 free coils, the insert delivers a maximum locking torque of 15.00 newton-meters and a minimum breakaway torque of 2.20 newton-meters. Installation requires a standard HELI-COIL installation tool compatible with tangless inserts.\u003c\/p\u003e\u003cp\u003eThis insert is used in applications where a stripped or weak threaded hole must be repaired or reinforced, or where an original design calls for a hardened internal thread in a softer base material. Typical installation scenarios include aerospace, marine, industrial equipment, and general mechanical assemblies where metric coarse threads are specified and corrosion resistance is a priority. Licensed mechanics and maintenance technicians in both production and repair settings install this type of insert as part of standard thread repair or engineered insert programs.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eGrade 304 stainless steel construction provides corrosion resistance in wet or chemically exposed environments\u003c\/li\u003e\n\u003cli\u003eTangless design eliminates the need for tang removal after installation, reducing installation steps and debris risk\u003c\/li\u003eM12 x 1.75 metric coarse thread profile fits standard metric fastener specifications\u003cli\u003e2D length-to-diameter ratio with 24 millimeter overall length suits standard thread engagement depth requirements\u003c\/li\u003e\n\u003cli\u003eMaximum locking torque of 15.00 newton-meters resists fastener loosening under vibration\u003c\/li\u003e\n\u003cli\u003eBright finish on 304 stainless steel base material\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in any application requiring an M12 x 1.75 metric coarse screw-locking threaded insert with a 2D engagement length. Parent material and hole preparation must conform to HELI-COIL specification for this insert size and thread form.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified mechanic or technician using a tangless HELI-COIL installation tool matched to the M12 x 1.75 insert size. The parent material must be drilled and tapped to the correct HELI-COIL tap size before the insert is driven. Ensure the work piece is secure and the hole is clean and free of chips or debris prior to installation. Do not use a standard tang-type installation tool with tangless inserts, as this will damage the insert coil.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: M12 x 1.75 Metric Coarse\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Insert Length\u003c\/strong\u003e: 24 millimeters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength to Diameter Ratio\u003c\/strong\u003e: 2D\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Free Coils\u003c\/strong\u003e: 11-1\/2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Outside Diameter\u003c\/strong\u003e: 14.30 millimeters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Outside Diameter\u003c\/strong\u003e: 15.00 millimeters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Locking Torque\u003c\/strong\u003e: 15.00 N\/m\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Breakaway Torque\u003c\/strong\u003e: 2.20 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\u003eCoating\/Finish\u003c\/strong\u003e: Bright\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTang Type\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\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: A4184-12CN240\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELI-COIL","offers":[{"title":"Default Title","offer_id":52046518321458,"sku":"A4184-12CN240","price":20.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/7712b58248404d821d4e695abeea074f.jpg?v=1790031248","url":"https:\/\/voomisupply.com\/products\/heli-coil-a4184-12cn240-m12-x-1-75-screw-locking-insert","provider":"Voomi Supply","version":"1.0","type":"link"}