{"product_id":"bilitools-3-8-16-thread-repair-kit-hss-drill-304-stainless-helicoil-inserts-case","title":"BILITOOLS 3\/8-16 Thread Repair Kit — HSS Drill, 304 Stainless Helicoil Inserts, Case","description":"\u003cp\u003e\u003cstrong\u003eBILITOOLS 3\/8-16 inch Thread Repair Kit is a complete HSS drill, tap and 304 stainless helicoil insert set designed to restore damaged 3\/8-16 SAE internal threads and strengthen weak metal fittings.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWhether you're fixing a stripped bolt hole in an engine block, restoring mounting points on a bracket, or creating a stronger thread in softer metals, this kit supplies the drill, tap, installation tool, break-off tool and stainless inserts needed to complete the repair. All pieces are housed in a sturdy iron case for transport and organization. The components are built for repeated use across metals, composites and plastics, so you can finish a repair the first time and return the part to reliable service.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this kit repair a stripped 3\/8-16 thread?\u003c\/h3\u003e\n\u003cp\u003eThe process removes the damaged material, cuts a new thread, and installs a stainless coil insert that provides a fresh, precision 3\/8-16 internal thread. Using the included HSS drill and tap yields accurate sizing before inserting the helicoil to restore strength and alignment.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUse the HSS drill to reach the correct minor diameter cleanly.\u003c\/li\u003e\n  \u003cli\u003eTap the hole with the supplied 3\/8-16 tap to form new threads for the insert.\u003c\/li\u003e\n  \u003cli\u003eWind a 304 stainless helicoil insert into the tapped hole with the installation tool.\u003c\/li\u003e\n  \u003cli\u003eBreak off the installation tang with the break-pin tool to finish the repair.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and applications is the kit suitable for?\u003c\/h3\u003e\n\u003cp\u003eThis kit works on steel, aluminum, cast iron, composites and many engineering plastics. It is designed for automotive, marine, machinery and household repairs where restored thread strength and durability are required.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAutomotive cylinder heads, intake manifolds and oil pans.\u003c\/li\u003e\n  \u003cli\u003ePlumbing fixtures, pump housings and valve mounts.\u003c\/li\u003e\n  \u003cli\u003eRepairing mounting bosses on machinery and brackets.\u003c\/li\u003e\n  \u003cli\u003eUse on composite panels and thicker polymer parts where metal inserts are needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat tools and parts come in the kit, and how are they organized?\u003c\/h3\u003e\n\u003cp\u003eThe set includes HSS drill bit, 3\/8-16 tap, multiple 304 stainless helicoil inserts, an installation driver, and a break-pin tool—arranged in a durable iron case for easy access. The layout keeps components protected and quick to identify when switching between jobs.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh-speed steel drill with 135° point for efficient penetration.\u003c\/li\u003e\n  \u003cli\u003ePrecision 3\/8-16 tap matched to the insert profile.\u003c\/li\u003e\n  \u003cli\u003e304 stainless inserts sized for longevity and higher torque capacity.\u003c\/li\u003e\n  \u003cli\u003eInstallation driver and break-off tool stored in labeled slots inside the case.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow long will a 304 stainless helicoil last compared to original threads?\u003c\/h3\u003e\n\u003cp\u003e304 stainless inserts provide a corrosion-resistant, wear-tolerant internal thread that often outlasts threads cut directly into softer metals. While lifetime depends on load and environment, the stainless coils reduce damage risk and allow higher clamp forces without pulling out.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCorrosion resistance extends service life in humid or marine settings.\u003c\/li\u003e\n  \u003cli\u003eInsert distributes load to surrounding material to prevent stripping.\u003c\/li\u003e\n  \u003cli\u003eSuitable for repeated assembly and disassembly compared with bare softer-metal threads.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? If you maintain vehicles, industrial equipment, plumbing, or do regular DIY metalwork and need a reliable way to repair or reinforce 3\/8-16 internal threads, BILITOOLS' kit provides the parts and tools to complete professional-strength thread repairs at the workshop or on-site.\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: Will this kit work on aluminum engine blocks?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The HSS drill, tap, and 304 stainless inserts are suitable for aluminum and restore stronger, corrosion-resistant threads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How many inserts are included for 3\/8-16 repairs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The kit contains multiple 3\/8-16 stainless helicoil inserts; see the case layout to confirm exact count for your kit version.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"BILITOOLS","offers":[{"title":"Default Title","offer_id":67592491139257,"sku":"B09WN5XS99","price":58.77,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/bilitools-front-iron-case-closed.jpg?v=1790564592","url":"https:\/\/redleafauto.ca\/products\/bilitools-3-8-16-thread-repair-kit-hss-drill-304-stainless-helicoil-inserts-case","provider":"Redleaf Auto","version":"1.0","type":"link"}