{"product_id":"kungjuer-thread-file-set-3-piece-metric-sae-chaser-files-heat-treated-carbon-steel-with-removable-handle","title":"KUNGJUER Thread File Set 3-Piece — Metric \u0026 SAE Chaser Files, Heat-Treated Carbon Steel with Removable Handle","description":"\u003cstrong\u003eKUNGJUER 3-piece thread file set restores damaged external threads on bolts, studs, screws and pipes in both metric and SAE sizes.\u003c\/strong\u003e\n\n\u003cp\u003eKeep threaded fasteners functional without replacing them: this compact set contains three multi-groove chaser files that re-cut or clean external threads across a broad range of metric and SAE pitches. Made from heat-treated carbon steel with a black oxide finish, each file is built to resist wear while delivering accurate thread profiles for workshop or field repairs. The removable handle and protective caps improve comfort and safety when working in tight or awkward spots.\u003c\/p\u003e\n\n\u003ch3\u003eWhich thread sizes are covered by the set?\u003c\/h3\u003e\n\u003cp\u003eThe set includes one metric file and two SAE files (UNF and UNC) to match common manufacturing and automotive standards. Each file has multiple grooves so a single tool can address several closely spaced pitches, reducing the number of tools you need to carry.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMetric grooves: 0.75mm, 1.00mm, 1.25mm, 1.50mm, 1.75mm, 2.00mm, 2.50mm, 3.00mm.\u003c\/li\u003e\n  \u003cli\u003eSAE UNF grooves: #9, #10, #12, #16, #20, #27, #28, #32.\u003c\/li\u003e\n  \u003cli\u003eSAE UNC grooves: #11, #12, #13, #14, #16, #18, #20, #24.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and accurate are the KUNGJUER chaser files?\u003c\/h3\u003e\n\u003cp\u003eThese files are manufactured from carbon steel that has been heat-treated for hardness and dimensional stability, then given a black oxide coating to reduce corrosion and glare. The result is a tool that resists edge deformation so the thread profile stays consistent through repeated use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHeat-treated carbon steel core for long-lasting cutting edges.\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish protects surfaces and reduces reflection.\u003c\/li\u003e\n  \u003cli\u003eMultiple grooves milled precisely to retain thread form accuracy.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I use the files safely and effectively?\u003c\/h3\u003e\n\u003cp\u003eAttach the removable handle for two-handed control, line the file with the damaged thread, and make steady forward strokes while maintaining the original thread angle. Protective end caps cover the sharp file tips when not in use, and the handle reduces hand fatigue during longer repairs.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInstall the handle for better leverage and control.\u003c\/li\u003e\n  \u003cli\u003eMatch the groove to the existing thread pitch before filing.\u003c\/li\u003e\n  \u003cli\u003eUse steady, light passes—inspect frequently to avoid over-cutting.\u003c\/li\u003e\n  \u003cli\u003eReplace protective caps after use to prevent injury and bluntness.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat kinds of jobs can these files handle?\u003c\/h3\u003e\n\u003cp\u003eThe KUNGJUER set is suited to many real-world tasks where replacing a fastener is impractical: reconditioning rusted bolts, cleaning burrs on studs, or tidying threads on pipe fittings. Their size and versatility make them useful for mechanics, maintenance teams, and DIYers alike.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAutomotive and engine maintenance (bolts, studs, wheel hardware).\u003c\/li\u003e\n  \u003cli\u003eIndustrial machinery and chassis repair tasks.\u003c\/li\u003e\n  \u003cli\u003ePiping and plumbing fittings with external thread damage.\u003c\/li\u003e\n  \u003cli\u003eElectrical equipment fastening and onsite maintenance work.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The KUNGJUER 3Pcs Thread File Set is ideal for professional mechanics, industrial maintenance crews, and serious hobbyists who need a portable, reliable way to restore external threads without replacing parts. If you regularly deal with damaged bolts, studs or fittings and want a durable, multipitch solution that fits a toolbox, this set provides broad coverage with ergonomic handling and corrosion-resistant construction.\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 repair both metric and SAE external threads?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The set includes one metric file and two SAE files (UNF and UNC) covering common pitches.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are the files protected against rust and wear?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They’re heat-treated carbon steel with a black oxide coating to improve wear resistance and reduce corrosion.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"KUNGJUER","offers":[{"title":"Default Title","offer_id":55166029103447,"sku":"B0FQC1RRVP","price":38.44,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/kungjuer-thread-file-set-front-view.jpg?v=1790361399","url":"https:\/\/britishgarage.co.uk\/products\/kungjuer-thread-file-set-3-piece-metric-sae-chaser-files-heat-treated-carbon-steel-with-removable-handle","provider":"British Garage","version":"1.0","type":"link"}