{"product_id":"kungjuer-3-piece-thread-file-set-metric-sae-thread-chasers-heat-treated-carbon-steel-with-black-oxide-finish","title":"KUNGJUER 3-Piece Thread File Set — Metric \u0026 SAE Thread Chasers, Heat‑Treated Carbon Steel with Black Oxide Finish","description":"\u003cp\u003e\u003cstrong\u003eKUNGJUER 3Pcs Thread File Set is a compact, professional-grade kit that restores damaged external threads in both metric and SAE sizes quickly and accurately.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWhen threads on bolts, studs, screws or pipes are worn or marred, replacing the entire fastener or component isn’t always necessary. This three-piece thread chaser set covers a wide range of metric and SAE sizes so you can re-cut and clean external threads on-site, saving time and money. Built from heat-treated carbon steel with a black oxide finish and supplied with removable handles and protective end caps, the kit is designed for repeatable precision, corrosion resistance, and safer handling in workshops and field environments.\u003c\/p\u003e\n\n\u003ch3\u003eWhich thread sizes are included and will they fit my fasteners?\u003c\/h3\u003e\n\n\u003cp\u003eThe set includes one metric chaser and two SAE chasers (UNF and UNC patterns) to cover common thread pitches. The metric file lists sizes from 0.75mm up to 3.00mm, while the SAE UNF and UNC files cover a broad range of fine and coarse American sizes. Check your fastener’s pitch or compare against included markings to select the matched tooth pattern for accurate restoration.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMetric file: 0.75mm, 1.00mm, 1.25mm, 1.50mm, 1.75mm, 2.00mm, 2.50mm, 3.00mm\u003c\/li\u003e\n  \u003cli\u003eSAE UNF file: sizes 9, 10, 12, 16, 20, 27, 28, 32\u003c\/li\u003e\n  \u003cli\u003eSAE UNC file: sizes 11, 12, 13, 14, 16, 18, 20, 24\u003c\/li\u003e\n  \u003cli\u003eMarked grooves let you match file rows to your fastener pitch quickly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and precise is this thread repair tool?\u003c\/h3\u003e\n\n\u003cp\u003eEach file is forged from carbon steel, heat-treated for hardness and stability, and finished with a black oxide coating that helps resist rust and reduces glare while working. The hardened teeth are cut to maintain profile accuracy through repeated use, so you get consistent restoration without rounding or undersizing threads. For best results, use light, controlled passes and keep the chaser aligned with the original thread angle.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eHeat-treated carbon steel for long wear resistance\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish for corrosion resistance and reduced reflection\u003c\/li\u003e\n  \u003cli\u003ePrecision-cut teeth maintain thread form through multiple repairs\u003c\/li\u003e\n  \u003cli\u003eRecommended: align carefully and use steady, light strokes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat accessories and safety features come with the set?\u003c\/h3\u003e\n\n\u003cp\u003eThe kit includes a removable, ergonomic handle that improves leverage and reduces hand fatigue during repetitive work. Protective end caps are supplied to cover sharp file ends when stored or transported, and the compact size makes the set easy to carry in a toolbox or field bag. These conveniences help prevent accidental injury and protect the file teeth when not in use.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eRemovable handle for improved grip and torque control\u003c\/li\u003e\n  \u003cli\u003eProtective end caps to shield teeth and hands\u003c\/li\u003e\n  \u003cli\u003eCompact footprint fits standard toolboxes and work belts\u003c\/li\u003e\n  \u003cli\u003eSimple storage reduces wear during transport\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this work for professional and DIY repair needs?\u003c\/h3\u003e\n\n\u003cp\u003eThe KUNGJUER chaser file set is intended for both hobbyists and professionals who need to restore external threads without replacing parts. It’s suitable for automotive chassis work, engine maintenance, piping, machinery upkeep, and general workshop repairs. While not a substitute for re-cutting internal threads or complete fastener replacement in critical aerospace or medical contexts, it excels at routine maintenance and on-the-spot fixes.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eUseful for mechanics, fabricators, plumbers and maintenance techs\u003c\/li\u003e\n  \u003cli\u003eIdeal for on-site repairs where quick thread restoration saves time\u003c\/li\u003e\n  \u003cli\u003eNot intended for precision rethreading of critical aerospace\/medical parts\u003c\/li\u003e\n  \u003cli\u003ePairs well with simple thread gauges to confirm pitch before use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The KUNGJUER 3Pcs Thread File Set is made for professionals and DIYers who frequently encounter damaged external threads and need a compact, durable kit to restore fasteners quickly. If you maintain vehicles, industrial equipment, piping systems, or electrical enclosures and want a reliable, portable solution for thread clean-up, this set covers common metric and SAE sizes and is ready for workshop or field use.\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 files restore both metric and SAE external threads?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit includes one metric file and two SAE files (UNF and UNC), covering a wide range of common external thread sizes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are the files durable enough for repeated use?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. They are heat-treated carbon steel with a black oxide finish for wear resistance and corrosion protection.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"KUNGJUER","offers":[{"title":"Default Title","offer_id":48084609106078,"sku":"B0FQC1RRVP","price":39.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/kungjuer-front-packaging-thread-file-set.jpg?v=1785860746","url":"https:\/\/northtrailauto.ca\/products\/kungjuer-3-piece-thread-file-set-metric-sae-thread-chasers-heat-treated-carbon-steel-with-black-oxide-finish","provider":"North Trail Auto","version":"1.0","type":"link"}