{"product_id":"kolvoii-61-piece-thread-chaser-set-metric-unc-unf-thread-restorer-kit-heat-treated-steel-color-coded","title":"Kolvoii 61-Piece Thread Chaser Set — Metric, UNC \u0026 UNF Thread Restorer Kit, Heat-Treated Steel, Color-Coded","description":"\u003cp\u003e\u003cstrong\u003eKolvoii 61-Piece Thread Chaser Set is a complete metric, UNC and UNF thread-restoration kit designed to quickly re-cut and clean damaged or corroded internal and external threads without welding or helicoils.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWhether you service engines, plumbing, or machinery, this organized kit gives you the taps, dies, files and pitch gauges to revive worn threads reliably. Color-coded taps and dies speed identification for SAE (UNC), UNF and Metric standards, and the heat-treated carbon steel construction resists wear so the tools stay accurate through repeated jobs.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I use the kit to fix a damaged spark plug or bolt thread?\u003c\/h3\u003e\n\u003cp\u003eStart by matching thread type with the included pitch gauges, then choose the color-coded tap or die. Use the restorer files to clear corrosion and guide the tool, then slowly run the tap or die with light cutting oil to reform the thread without removing excessive material.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIdentify thread with the standard and metric pitch gauges\u003c\/li\u003e\n  \u003cli\u003eClean the hole or bolt with a restorer file before cutting\u003c\/li\u003e\n  \u003cli\u003eUse slow, even pressure and backing turns to avoid tearing\u003c\/li\u003e\n  \u003cli\u003eApply cutting fluid for smoother rethreading and longer tool life\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich thread sizes are included for metric, UNC and UNF repairs?\u003c\/h3\u003e\n\u003cp\u003eThe set covers a broad range of common fasteners for automotive and industrial work. It includes 28 taps and 28 dies across specified sizes plus three restorer file profiles to handle damaged starts and imperfect threads.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUNC (silver): 5\/8”-11 down to 1\/4”-20 for coarse fasteners\u003c\/li\u003e\n  \u003cli\u003eUNF (black): 5\/8”-18 down to 1\/4”-28 for fine fasteners\u003c\/li\u003e\n  \u003cli\u003eMetric (gold): M6 through M14 with pitches from 1.0 to 1.75\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat makes these taps, dies and files durable and easy to use?\u003c\/h3\u003e\n\u003cp\u003eEach component is forged from heat-treated carbon steel and finished with corrosion-resistant coatings—zinc for UNC, black oxide for UNF, and gold finish for metric—so they keep accurate profiles longer. Hex-shaped shanks accept common wrenches or sockets, while the blow-molded case keeps everything organized for field or shop work.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHeat-treated carbon steel construction for hardness and longevity\u003c\/li\u003e\n  \u003cli\u003eColor-coded finishes for quick size identification\u003c\/li\u003e\n  \u003cli\u003eHex shanks fit standard tools for fast operation\u003c\/li\u003e\n  \u003cli\u003eRugged case prevents lost pieces during transport\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow can I use this set safely and get consistent results?\u003c\/h3\u003e\n\u003cp\u003eKeep cutting fluid on hand, clear chips often, and back the tap or die every few turns to avoid clogging or breakage. Use the files to reshape thread starts and remove rust before cutting to ensure the restored thread seats properly without cross-threading.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eApply cutting oil to reduce friction and heat\u003c\/li\u003e\n  \u003cli\u003eBack off taps frequently to clear chips and reduce breakage risk\u003c\/li\u003e\n  \u003cli\u003eStart with the file to realign damaged thread entries\u003c\/li\u003e\n  \u003cli\u003eInspect the repaired threads with a mating bolt or plug to confirm fit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: technicians, mechanics, machinists, plumbers and serious DIYers who need a portable, professional-grade thread-restoration solution. If you regularly work on cylinder heads, engine blocks, pipe fittings, suspension components or household hardware, the Kolvoii 61-piece kit supplies the common sizes, organization and durability you need to perform reliable thread repairs on the spot.\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 set repair both internal and external threads?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit includes 28 taps for internal threads and 28 dies for external threads across metric, UNC and UNF sizes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will the taps and dies fit a standard wrench or socket?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Hex-shaped shanks on the taps and dies accept common wrenches or sockets for straightforward use.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Kolvoii","offers":[{"title":"Default Title","offer_id":67586455699641,"sku":"B0DGGQ8914","price":158.51,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/kolvoii-front-open-case.jpg?v=1790483952","url":"https:\/\/redleafauto.ca\/products\/kolvoii-61-piece-thread-chaser-set-metric-unc-unf-thread-restorer-kit-heat-treated-steel-color-coded","provider":"Redleaf Auto","version":"1.0","type":"link"}