{"product_id":"heli-coil-5402-4-thread-repair-kit-1-4-28-unf","title":"Heli-coil 5402-4 Thread Repair Kit 1\/4-28 Unf","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HELI-COIL 5402-4 is a complete thread repair kit designed to restore damaged or stripped 1\/4-28 UNF internal threads to full load-bearing strength. The kit centers on helically wound wire thread inserts that, once installed, create a durable threaded surface in the parent material. Insert lengths range from 0.25 inches to 0.5 inches, giving technicians flexibility for shallow and deeper thread repairs in the same bore. This kit is used across mechanical, HVAC, plumbing, and electrical service work wherever a stripped threaded hole must be brought back to spec without replacing the entire component.\u003c\/p\u003e\n\u003cp\u003eThis kit is suited for both shop and field repairs on 1\/4-28 UNF threaded holes in metal components. It is commonly used by HVAC technicians, pipefitters, electricians, and general maintenance mechanics on equipment housings, control panels, valve bodies, and structural fastener locations. The 36-insert count makes it a practical choice for recurring repair work rather than single-use jobs. Each kit includes everything needed to complete the repair without sourcing additional tooling separately.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eComplete kit: includes drill, tap, installation tool, tang removal tool, and 36 inserts\u003c\/li\u003e\n  \u003cli\u003eThread size 1\/4-28 UNF for fine-thread repair applications\u003c\/li\u003e\n  \u003cli\u003eThree insert lengths available: 0.25 inches, 0.375 inches, and 0.5 inches  -  12 inserts per length\u003c\/li\u003e\n  \u003cli\u003eTang removal tool size 3\/16 included for clean post-installation breakoff\u003c\/li\u003e\n  \u003cli\u003eInstallation tool part number 2299-4 and tap part number 4FPB included in kit\u003c\/li\u003e\n  \u003cli\u003eInsert package part number R1191-4 for reorder reference\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in any parent material threaded to 1\/4-28 UNF specification. Suitable for repair of stripped threads in metal housings, fastener bores, and tapped holes conforming to UNF fine-thread standards.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThread repair inserts of this type are installed by licensed mechanics, HVAC technicians, or qualified maintenance personnel following the drill-tap-install sequence. Power down or de-energize any equipment before beginning thread repair work near electrical or control components. Use the included drill and tap to prepare the bore to the correct diameter before driving the insert with the provided installation tool. Remove the tang with the included 3\/16 tang removal tool after the insert is fully seated.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Thread Size\u003c\/strong\u003e: 1\/4-28\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Length (Standard)\u003c\/strong\u003e: 0.375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShortest Insert Length\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLongest Insert Length\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Inserts\u003c\/strong\u003e: 36\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInserts per Length\u003c\/strong\u003e: 12\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTang Removal Tool Size\u003c\/strong\u003e: 3\/16\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstallation Tool Part Number\u003c\/strong\u003e: 2299-4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTap Part Number\u003c\/strong\u003e: 4FPB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Package Part Number\u003c\/strong\u003e: R1191-4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncludes Drill\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncludes Tap\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncludes Installation Tool\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncludes Tang Removal Tool\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27112810\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: 5402-4\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELI-COIL","offers":[{"title":"Default Title","offer_id":51972382785842,"sku":"5402-4","price":142.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ca5780627cb5ee76d5ad8fe60e1a5d2a.jpg?v=1789967258","url":"https:\/\/voomisupply.com\/products\/heli-coil-5402-4-thread-repair-kit-1-4-28-unf","provider":"Voomi Supply","version":"1.0","type":"link"}