Orion Motor Tech Thread Repair Kit 344-Piece SAE & Metric — Compact Case, Heat‑Treated Tools

Orion Motor Tech’s 344-piece OMT Thread Repair Kit restores stripped internal threads in both SAE and metric sizes using drill bits, taps, wire inserts, and installation tools for a complete repair solution.

This all-in-one thread restorer bundle supplies the parts and tools you need to recover damaged bolt holes or to reinforce frequently serviced threads. Housed in a compact carrying case, the kit includes the most commonly used imperial and metric sizes—ranging from 1/4" to 1/2" and M5 to M12—so you can work on automotive, industrial, and household projects without hunting for individual components. Every cutting and installation tool is heat-treated steel for repeated use, and the set comes with installation and tang break-off tools to finish each repair cleanly.

How does the kit repair stripped threads?

The kit repairs damaged internal threads by enlarging the hole to the correct sized diameter, cutting a new thread pattern, and inserting a coiled wire-thread insert to recreate the original thread profile. This method preserves the parent material while providing a durable new thread with steel coil strength. The included break-off tools remove installation tangs to leave a flush, usable hole.

• Stepwise process: drill, tap, insert, break off.
• Coil inserts restore original bolt fit and torque capacity.
• 135° drill bits ensure accurate hole clearance for inserts.
• Tang break-off tools cleanly finish the insert installation.

Which sizes and components are included?

Inside the molded case you’ll find drill bits, taps, wire inserts, installation mandrels, and tang break-off tools in the five most common SAE and metric ranges. The set covers 1/4", 5/16", 3/8", 7/16", 1/2" plus M5, M6, M8, M10, and M12, providing a broad fit for engines, gearboxes, and machinery. Every component is labeled and organized for quick selection on the job.

• SAE sizes: 1/4" to 1/2" (five sizes)
• Metric sizes: M5 to M12 (five sizes)
• Includes drills, taps, wire inserts, mandrels, break-off tools
• Compact foam tray holds all 344 pieces for fast access

How durable and easy to use are the tools?

Each cutting and installation tool is forged from heat-treated steel to resist wear and maintain cutting performance over multiple repairs. The sequence—drill, tap, install—uses straightforward hand or powered tools and the kit supplies the correct drill angles so inserts seat cleanly. Clear labeling and a dedicated case reduce setup time and help avoid mix-ups between SAE and metric parts.

• Heat-treated steel for long service life
• 135° drill points for accurate clearance holes
• Installation tools align and seat inserts reliably
• Molded case keeps parts sorted and transportable

What jobs is this kit best suited for?

This repair kit is ideal for restoring stripped bolt holes in engines, transmission housings, machinery frames, and any component that uses internal threads. It also serves well for preventative maintenance—installing wire inserts in high-wear areas to avoid future thread failure. The kit works with aluminum, cast iron, steel, and other common workshop materials.

• Engine head and block repairs
• Transmission and gearbox thread restoration
• Machine tool and fixture thread reinforcement
• Maintenance installs to extend thread life

Who is this for: The Orion Motor Tech OMT 344pc Thread Repair Kit is aimed at professional mechanics, industrial maintenance crews, and serious DIYers who want a single, portable solution for thread restoration and reinforcement. If you frequently work on vehicles, equipment, or assemblies where stripped threads interrupt projects, this kit gives the sizes, hardened tools, and organized storage to complete reliable repairs without sourcing separate parts.