Thread Repair Kit

About these products High-quality steel for long-lasting durability Our thread repair kits are made of hardened HSS steel with a hardness of HRC 50–62, depending on the model. The finely ground surface ensures high wear resistance and corrosion resistance. The Helicoil thread inserts are made of 304 stainless steel and offer stable and durable thread restoration, even in demanding applications. Precise repair of damaged threads The kits are used to locate, clean, and repair worn or damaged internal and external threads. They remove rust, dirt, and deposits without unnecessarily affecting the thread structure. Ideal for bolt holes on cylinder heads, engine blocks, vehicle components, machine parts, or workshop projects. Comprehensive size coverage Depending on the model, the kits cover UNC, UNF, and metric standards. Color coding facilitates quick identification of the thread types. UNC sizes include 1/4"-20, 5/16"-18, 3/8"-16, 7/16"-14, 1/2"-13, 9/16"-12, and 5/8"-11. UNF sizes include 1/4"-28, 5/16"-24, 3/8"-24, 7/16"-20, 1/2"-20, 9/16"-18, and 5/8"-18. Metric sizes range from M5 to M14, depending on the set. Thread Files and Special Tools Select sets include thread files with various pitches for quickly repairing damaged external threads. Protective caps prevent damage to the cutting edges and increase safety during use. Helicoil sets also include twist drills, installation tools, break-in tools, and Allen wrenches for a complete repair sequence. Easy to Use Repairs are carried out in clear steps: drill, tap, insert, and break the stud. Ergonomic handles ensure a secure grip. Suitable for mechanics, workshops, automotive service technicians, and DIY enthusiasts. Practical Storage Case All components are neatly organized in a robust carrying case. This facilitates transport, storage, and quick access in everyday work. Key Model Differences Model XRSS049 is a 49-piece set with 24 dies, 22 taps, and 3 thread files for UNC, UNF, and metric threads. Model XRSS061 expands the set to 61 pieces with 28 dies, 28 taps, and 3 thread files, plus additional metric size coverage. Model XRGY338 is a 338-piece Helicoil complete set for metric and SAE sizes, including thread inserts, twist drills, installation tools, and breaking tools. Model XRGZ166 is a 166-piece metric Helicoil set with 145 thread inserts and the necessary tools for M5, M6, M8, M10, and M12 threads. Specifications Model: XRSS049 Number of Parts: 49 Material: HSS Thread Standards: UNC UNF Metric Color: Red Black Model: XRSS061 Number of Parts: 61 Material: HSS Thread Standards: UNC UNF Metric Color: Red Black Gold White Model: XRGY338 Number of Parts: 338 Material: HSS SAE Sizes: 1/4", 5/16", 3/8", 7/16", 1/2" Metric Sizes: M5 M6 M8 M10 M12 Color: Red Blue Black Model: XRGZ166 Number of Parts: 166 Material: HSS Metric Sizes: M5 M6 M8 M10 M12 Color: Red Black Package Contents Model XRSS049 1 x Thread Repair Kit 1 x User Manual Model XRSS061 1 x Thread Repair Kit 1 x User Manual Model XRGY338 1 x Thread Repair Kit 1 x User Manual Model XRGZ166 1 x Thread Repair Kit 1 x User Manual