{"product_id":"bilitools-helicoil-thread-repair-kit-metric-m5-m12-304-stainless-inserts-hss-drills-taps-blow-mold-case","title":"BILITOOLS Helicoil Thread Repair Kit Metric M5–M12 — 304 Stainless Inserts \u0026 HSS Drills\/Taps, Blow-Mold Case","description":"\u003cp\u003e\u003cstrong\u003eBILITOOLS Helicoil Thread Repair Kit Metric is a complete thread-repair set with 304 stainless inserts, HSS drills and taps designed to restore and strengthen damaged internal threads from M5 to M12.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis kit brings together the core tools needed to repair stripped or worn metric threads and to create higher-strength internal threads in weaker materials. Everything fits into a blow-molded case for workshop or mobile use. The combination of hardened 4241 HSS drills and taps plus corrosion-resistant 304 stainless inserts helps deliver durable, torque-ready threads across metals, composites and plastics.\u003c\/p\u003e\n\n\u003ch3\u003eWhat sizes and components are included in this metric Helicoil set?\u003c\/h3\u003e\n\n\u003cp\u003eThe kit supplies a range of commonly used metric sizes and the matching tooling to install each insert. It includes drills, taps, break-out tools and a large quantity of 304 stainless threaded inserts so you can repair multiple fasteners without replenishing stock quickly.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eDrills: 5 pcs 4241 HSS drill bits (one per size)\u003c\/li\u003e\n  \u003cli\u003eTaps: 5 pcs 4241 HSS taps (one per size)\u003c\/li\u003e\n  \u003cli\u003eBreak pin tools: 5 pcs for insert tang removal\u003c\/li\u003e\n  \u003cli\u003eThread inserts: 25 each of M5 x 0.8, M6 x 1.0, M8 x 1.25, M10 x 1.5; 10 each of M12 x 1.75\u003c\/li\u003e\n  \u003cli\u003ePackaged in a blow-molded carrying case\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this kit make stripped threads stronger and longer lasting?\u003c\/h3\u003e\n\n\u003cp\u003e304 stainless steel inserts reline the original hole, creating a corrosion-resistant, wear-resistant internal thread that accepts higher torque than many base materials alone. Using properly sized HSS drills and taps ensures accurate preparation so inserts seat flush and engage fully.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eStainless inserts resist wear and corrosion compared with raw tapped holes\u003c\/li\u003e\n  \u003cli\u003eHSS 4241 drills with 135° apex angle for efficient metal penetration\u003c\/li\u003e\n  \u003cli\u003eTaps cut precise repair threads for full insert engagement\u003c\/li\u003e\n  \u003cli\u003eBreak pin tools remove tangs cleanly after installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich materials and applications is the Helicoil kit suitable for?\u003c\/h3\u003e\n\n\u003cp\u003eThe kit is built for versatility: it works in ferrous and non-ferrous metals, composites and many engineering plastics. It's especially useful where the base material is softer or has lost thread strength—common in automotive, plumbing, machinery and maintenance work.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eAutomotive engine blocks, cylinder heads and mounting points\u003c\/li\u003e\n  \u003cli\u003ePlumbing fittings and metal housings prone to thread wear\u003c\/li\u003e\n  \u003cli\u003eRepair of aluminum parts and castings where original threads fail\u003c\/li\u003e\n  \u003cli\u003eMaintenance tasks on equipment and industrial machinery\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat tools and technique tips ensure a correct installation?\u003c\/h3\u003e\n\n\u003cp\u003eFollow a consistent sequence: drill to the recommended diameter, tap the hole, insert the coil with the installer, and break off the tang. Using the included HSS drill and tap sized for each insert helps avoid over- or under-sizing and preserves alignment for reliable thread engagement.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eUse the matching HSS drill bit supplied for the insert size\u003c\/li\u003e\n  \u003cli\u003eKeep drill and tap perpendicular to avoid misalignment\u003c\/li\u003e\n  \u003cli\u003eApply cutting lubricant when tapping metals for cleaner cuts\u003c\/li\u003e\n  \u003cli\u003eUse the break pin tool to remove the tang without damaging threads\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The BILITOOLS Helicoil Thread Repair Kit Metric is for mechanics, maintenance technicians, DIYers and fabricators who need a reliable way to restore or upgrade internal threads. It’s ideal for people who work on cars, small engines, industrial equipment or any project where stripped metric threads must be repaired quickly and with durable results. The organized case and the range of inserts make this kit suitable for both mobile service calls and shop benches.\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: What sizes of thread inserts come with the kit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Includes 25 each of M5, M6, M8, M10 and 10 each of M12 metric inserts with matching drills and taps.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use these inserts in aluminum and plastic?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the 304 stainless inserts and HSS tooling are suitable for aluminum, plastics, composites and most metals.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"BILITOOLS","offers":[{"title":"Default Title","offer_id":48083256541342,"sku":"B0C5DBVSHZ","price":64.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/bilitools-front-case.jpg?v=1785829993","url":"https:\/\/northtrailauto.ca\/products\/bilitools-helicoil-thread-repair-kit-metric-m5-m12-304-stainless-inserts-hss-drills-taps-blow-mold-case","provider":"North Trail Auto","version":"1.0","type":"link"}