{"product_id":"bilitools-helicoil-thread-repair-kit-metric-m5-m12-stainless-inserts-hss-tools-case","title":"BILITOOLS Helicoil Thread Repair Kit Metric M5–M12 — Stainless Inserts \u0026 HSS Tools, Case","description":"\u003cstrong\u003eBILITOOLS Helicoil Thread Repair Kit Metric is a complete M5–M12 stainless-steel insert system that restores stripped internal threads and creates stronger, longer-lasting fastener points.\u003c\/strong\u003e\n\n\u003cp\u003eIf a bolt hole in an engine mount, gearbox housing, or plumbing fitting has been damaged, this kit supplies the drills, taps, installation tools and stainless inserts needed to rebuild the thread to factory or stronger specification. The set combines hardened twist drills with taps and 304 stainless helicoil-style inserts sized for the most common metric fasteners, packaged in a molded carrying case so you can tackle repairs on the bench or at the job site.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I use this kit to repair a stripped thread?\u003c\/h3\u003e\n\u003cp\u003eRepairing a thread is a three-step process: drill to the specified oversized pilot, cut the new female thread using the matched tap, then insert the coiled stainless insert so it locks into the fresh thread. The kit includes break-off tang tools to seat and remove the tang once the insert is installed.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDrill with the supplied 4241 HSS twist drill sized for each insert.\u003c\/li\u003e\n  \u003cli\u003eTap the hole using the matching 4241 HSS tap included.\u003c\/li\u003e\n  \u003cli\u003eUse the break pin tool to wind the 304 stainless insert into place, then break off the tang.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich fastener sizes and quantities are included?\u003c\/h3\u003e\n\u003cp\u003eThe kit covers the most frequently used metric sizes from M5 through M12, with higher quantities of smaller sizes for common repairs. Inserts are stainless steel for corrosion resistance and higher torque capacity than many base materials.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eM5 x 0.8: 25 inserts\u003c\/li\u003e\n  \u003cli\u003eM6 x 1.0: 25 inserts\u003c\/li\u003e\n  \u003cli\u003eM8 x 1.25: 25 inserts\u003c\/li\u003e\n  \u003cli\u003eM10 x 1.5: 25 inserts\u003c\/li\u003e\n  \u003cli\u003eM12 x 1.75: 10 inserts\u003c\/li\u003e\n  \u003cli\u003eIncludes 5 matching HSS drills, 5 HSS taps and 5 break-pin tools for the set of sizes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and applications is the kit suitable for?\u003c\/h3\u003e\n\u003cp\u003eThese stainless inserts and HSS cutting tools work in a broad range of substrates: ferrous and non-ferrous metals, composites and many polymers. That versatility makes the kit useful for automotive, motorcycle, marine, construction and household plumbing repairs.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e304 stainless inserts resist corrosion where exposure to moisture or salty air is expected.\u003c\/li\u003e\n  \u003cli\u003eHSS 4241 drills and taps provide strong cutting performance through metals and composites.\u003c\/li\u003e\n  \u003cli\u003eIdeal for engine components, transmission housings, motor mounts, valve bodies and threaded fittings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat does the case and tooling offer for workshop efficiency?\u003c\/h3\u003e\n\u003cp\u003eAll components are arranged in a blow-molded case so you can quickly identify the correct drill, tap and insert size. Organized tooling reduces downtime and protects small parts during transport or storage.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eClearly labeled cavities for drills, taps, inserts and break-pin tools.\u003c\/li\u003e\n  \u003cli\u003eCompact case fits on a bench, in a van, or in a toolbox drawer.\u003c\/li\u003e\n  \u003cli\u003eDurable molded plastic protects HSS tools and stainless inserts from damage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The BILITOOLS Helicoil Thread Repair Kit Metric is designed for professional mechanics, maintenance technicians, DIY enthusiasts and tradespeople who need a reliable, repeatable way to restore stripped or undersized internal threads. If you repair engines, gearboxes, plumbing fixtures, brackets or any component that relies on threaded fasteners, this kit supplies the matched drill, tap, install tool and corrosion-resistant inserts to complete the job quickly and correctly.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can these inserts be used in aluminum?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The 304 stainless inserts and HSS taps are suitable for aluminum and other softer metals to provide stronger threads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need special tools beyond what's included?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No special tools are required; the kit includes the drills, taps and break-pin tools. A tap wrench and drill driver are recommended but commonly available.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"BILITOOLS","offers":[{"title":"Default Title","offer_id":55168605323607,"sku":"B0C5DBVSHZ","price":72.74,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/bilitools-thread-repair-kit-front-view.jpg?v=1790409919","url":"https:\/\/britishgarage.co.uk\/products\/bilitools-helicoil-thread-repair-kit-metric-m5-m12-stainless-inserts-hss-tools-case","provider":"British Garage","version":"1.0","type":"link"}