{"product_id":"bilitools-3-8-16-thread-repair-kit-304-stainless-helicoil-inserts-hss-drill-tap-set","title":"BILITOOLS 3\/8-16 Thread Repair Kit — 304 Stainless Helicoil Inserts \u0026 HSS Drill\/Tap Set","description":"\u003cp\u003e\u003cstrong\u003eBILITOOLS 3\/8-16 inch Thread Repair Kit is a complete HSS drill, tap, helicoil insert and installation set designed to restore stripped or damaged SAE threads quickly and reliably.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis professional-grade kit supplies everything needed to repair internal threads in metals, composites and plastics. Built around durable 304 stainless steel thread inserts and high-speed steel (HSS) cutting tools, the set replaces worn threads with a stronger, corrosion-resistant coil and ships organized in a compact iron case for workshop portability.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this kit restore stripped threads?\u003c\/h3\u003e\n\n\u003cp\u003eThe kit works by enlarging the damaged hole to a precise size, threading the enlarged hole with the included tap, and inserting a stainless steel coil that forms new internal threads. The helicoil insert provides a durable mating surface that resists wear and accepts standard SAE fasteners.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHSS drill bit sized for 3\/8-16 thread preparation\u003c\/li\u003e\n  \u003cli\u003eHigh-quality tap to cut the new internal thread profile\u003c\/li\u003e\n  \u003cli\u003e304 stainless helicoil inserts replace damaged threads\u003c\/li\u003e\n  \u003cli\u003eInstallation and tang-break tools complete the process\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and applications is it suitable for?\u003c\/h3\u003e\n\n\u003cp\u003eThis repair kit is formulated for use in a wide range of substrates including steel, aluminum, cast iron, composites and many plastics. It’s commonly used in automotive, plumbing, machinery and marine maintenance where restored thread strength matters.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSafe for all common metals and many composite materials\u003c\/li\u003e\n  \u003cli\u003eIdeal for cylinder heads, engine blocks, housings and fittings\u003c\/li\u003e\n  \u003cli\u003eWidely used by mechanics, fabricators and maintenance pros\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat tools are included and how are they organized?\u003c\/h3\u003e\n\n\u003cp\u003eThe set bundles the essential hardware and tools so you can complete a repair without chasing parts. All items are packed into a durable iron case that keeps tools protected and organized between jobs.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHSS drill and 135° apex angle for efficient cutting\u003c\/li\u003e\n  \u003cli\u003eMatching tap and installation driver for helicoil seating\u003c\/li\u003e\n  \u003cli\u003e304 stainless thread inserts and a tang-break tool\u003c\/li\u003e\n  \u003cli\u003eCompact iron storage case for transport and on-site use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I choose the right size and avoid mistakes?\u003c\/h3\u003e\n\n\u003cp\u003eConfirm the fastener spec (3\/8-16 UNF) before purchasing; the set is purpose-built for that SAE size. If you are unsure which repair kit you need, inspect the damaged fastener, measure the original bolt diameter and thread count, or consult the kit's sizing reference image to match the correct drill and tap.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify original thread is 3\/8-16 before starting\u003c\/li\u003e\n  \u003cli\u003eFollow the included sizing diagram and torque guidance\u003c\/li\u003e\n  \u003cli\u003ePractice on scrap material if you’re new to helicoil installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this kit is for: This BILITOOLS kit is aimed at mechanics, DIYers, fleet technicians and tradespeople who need a reliable, portable solution to repair stripped SAE threads. If you want a robust stainless-steel insert system with matching HSS cutting tools and a neat carrying case, this set gives you the parts and workflow for repeatable thread restoration on engines, equipment housings and structural components.\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 this kit repair threads in aluminum?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit’s 304 stainless inserts and HSS tools are suitable for aluminum and many other metals and composites.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the set include everything to finish a repair?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It contains drill, tap, inserts, installation driver and tang-break tool, plus an iron case for storage.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"BILITOOLS","offers":[{"title":"Default Title","offer_id":48086987833502,"sku":"B09WN5XS99","price":31.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/bilitools-iron-case-organized.jpg?v=1785912386","url":"https:\/\/northtrailauto.ca\/products\/bilitools-3-8-16-thread-repair-kit-304-stainless-helicoil-inserts-hss-drill-tap-set","provider":"North Trail Auto","version":"1.0","type":"link"}