{"product_id":"tommars-thread-file-set-3-piece-sae-metric-external-thread-restorer-with-protective-caps","title":"TOMMARS Thread File Set — 3-Piece SAE \u0026 Metric External Thread Restorer with Protective Caps","description":"\u003cp\u003e\u003cstrong\u003eTOMMARS 3-piece SAE and Metric thread file set restores damaged external threads on bolts, shafts, studs and pipe ends quickly and precisely.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWhether you’re a mechanic, maintenance tech, or a DIYer, stripped or flattened external threads don’t have to mean replacement. This compact kit contains three hardened carbon-steel thread files cut to match the most common SAE and metric thread pitches, protective snap-on end caps for safer handling, and a slim storage sleeve for organized transport. The files re-cut and clean threads so fasteners run true again without swapping parts.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these files repair crushed or rusted threads?\u003c\/h3\u003e\n\u003cp\u003eThe files have precision-cut teeth shaped to follow external thread profiles. By aligning the file across the damaged section and making controlled passes, you remove corrosion and restore the thread’s crest and flank geometry so nuts and mates can engage smoothly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHardened carbon-steel teeth for durable cutting performance\u003c\/li\u003e\n  \u003cli\u003eUniform tooth pattern to re-form crest and flanks consistently\u003c\/li\u003e\n  \u003cli\u003eWorks on rust, burrs, flattened peaks and light deformation\u003c\/li\u003e\n  \u003cli\u003eSnap-on end caps help steady the tool for fine passes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich thread sizes are covered in this set?\u003c\/h3\u003e\n\u003cp\u003eThe set combines the most frequently used SAE and metric external pitches so one kit covers a wide workshop range. You’ll find both coarse and fine pitches that suit common bolts, studs and pipe threads encountered in automotive, plumbing and machinery repairs.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSAE sizes: 9, 10, 12, 16, 20, 27, 28, 32 and 11, 12, 13, 14, 16, 18, 20, 24\u003c\/li\u003e\n  \u003cli\u003eMetric pitches: 0.75mm, 1.0mm, 1.25mm, 1.50mm, 1.75mm, 2.00mm, 3.00mm\u003c\/li\u003e\n  \u003cli\u003eThree files cover both coarse and fine thread series\u003c\/li\u003e\n  \u003cli\u003eCompact sleeve keeps sizes organized and protected\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat makes these files comfortable and safe to use?\u003c\/h3\u003e\n\u003cp\u003eEach file is delivered with a snap-on protective end cap that shields the cutting edges and gives you a safer, more controlled grip. The caps reduce the chance of accidental nicks while you position or pass the file across tight thread sections.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSnap-on end caps for hand protection and improved control\u003c\/li\u003e\n  \u003cli\u003eSlim, lightweight files reduce hand fatigue during repetitive passes\u003c\/li\u003e\n  \u003cli\u003eStorage sleeve prevents edge damage and keeps files separated\u003c\/li\u003e\n  \u003cli\u003eEasy to carry in tool carts, glove boxes, or field kits\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I use the set for best results?\u003c\/h3\u003e\n\u003cp\u003eStart by matching the closest file pitch to the damaged thread, then align lightly and make a few gentle forward strokes to re-form the profile. Clean debris often, inspect the mating fastener for wear, and avoid over-cutting by using light, controlled pressure.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eChoose matching pitch and hold the file square to the thread axis\u003c\/li\u003e\n  \u003cli\u003eUse light, even strokes and check progress frequently\u003c\/li\u003e\n  \u003cli\u003eRemove filings and corrosion between passes for consistent results\u003c\/li\u003e\n  \u003cli\u003eTest-fit fastener; repeat minimally until threads run smoothly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The TOMMARS 3-piece thread file set is suited to mechanics, maintenance personnel, machine-shop operators and home mechanics who prefer repairing fasteners over replacing them. It’s especially useful for field service, emergency repairs, vintage equipment maintenance, and any situation where a quick, reliable thread restoration saves time and expense. The compact sleeve and protective caps make it convenient for everyday toolboxes and on-site tool kits, providing a cost-effective way to keep threaded connections functional without changing original parts.\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 fix a completely stripped bolt?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They restore external thread profiles but won’t recreate severely damaged core material; best for flattened, corroded, or minorly deformed threads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are the files suitable for stainless steel threads?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They work on many metals, but stainless is harder to file; use light strokes and check progress to avoid excessive wear on the tool.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"TOMMARS","offers":[{"title":"Default Title","offer_id":48085808906398,"sku":"B0BCP7LC6C","price":45.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/tommars-front-view-three-files-sleeve.jpg?v=1785877576","url":"https:\/\/northtrailauto.ca\/products\/tommars-thread-file-set-3-piece-sae-metric-external-thread-restorer-with-protective-caps","provider":"North Trail Auto","version":"1.0","type":"link"}