Collection: Auto - Thread

Save your project from stripped bolt holes, cross-threaded hardware, and rusted fasteners with our professional selection of Auto Thread repair and restoration gear. At DIY Customs, we provide high-durability thread repair inserts (including specialized helical wire kits), heavy-duty metric and SAE tap and die sets, durable thread restoring files, and specialized pitch gauges designed for a perfect fit during engine assembly, chassis fabrication, and general automotive maintenance. Whether you are seeking a specialized time-saving thread file to clean up rusty exhaust manifold studs, outfitting your shop with specialized spark plug thread chasers to repair delicate aluminum cylinder head entries, or seeking a complete master kit to restore stripped oil pan drain plugs, our professional-grade machining hardware offers the precise cutting strength and restoration safety you need at unbeatable prices. From specialized thread locking fluids to direct-fit tooling for automotive mechanics, we carry the essential repair gear to keep your hardware holding tight. Don't see the specific thread pitch size, tap length, or specialized insert kit for your custom bolt layout? Hit the live chat or call 412-882-8346—we can special order and drop-ship exactly what you are looking for directly to your doorstep!