Orion Motor Tech Thread Repair Kit — 344‑piece SAE & Metric Set with Heat‑Treated Taps

The Orion Motor Tech 344-piece Thread Repair Kit is a complete SAE and metric Helicoil-style insert system for restoring and protecting stripped internal threads quickly and reliably.

Designed for mechanics, home garages and maintenance crews, this all-in-one kit supplies the drill bits, taps, wire thread inserts, insertion tools and tang break-off tools needed to repair damaged threads or install new, stronger threads in common bolt sizes. The tools are heat-treated steel for durability and the kit covers the five most-used SAE sizes and five metric sizes so you can tackle automotive, industrial and DIY projects without hunting for parts.

How does this kit restore stripped threads?

The kit restores damaged internal threads by enlarging the worn hole to the correct size, cutting new threads with a tap and inserting a coiled-wire thread insert to recreate the original thread pitch and strength. Inserts are then seated and their tangs broken off for a flush, factory-like finish. The process returns thread integrity and prepares holes to accept standard fasteners again.

• Includes correctly sized 135° drill bits to clear damaged material
• High-quality taps cut precise new internal threads
• Coil-style inserts reestablish original thread pitch and strength
• Tang break-off tools finish the repair for smooth bolt engagement

Which sizes and standards are included in the set?

This kit covers the most frequently used SAE and metric sizes so you can repair typical automotive and equipment fasteners without additional purchases. Both small and larger diameters are represented to match common threaded holes in engines, housings and machinery.

• SAE: 1/4", 5/16", 3/8", 7/16", 1/2"
• Metric: M5, M6, M8, M10, M12
• Complete taps, drill bits, wire inserts and installation tools for each size
• Carries enough inserts and hardware for multiple repairs

What makes the tools durable and easy to use?

Each component is manufactured from heat-treated steel to resist wear during repeated use and to maintain cutting edges on taps and drills. The kit is arranged in a molded case so you can find the correct size quickly and transport the set without losing pieces.

• Heat-treated steel taps and installation tools for longer life
• 135° drill bits designed to make proper clearance holes fast
• Molded carrying case keeps parts organized and portable
• Step-by-step repair flow: drill, tap, insert, break-off

How will this kit speed up workshop repairs?

Because it consolidates all required sizes and tools into one kit, you avoid delays searching for compatible inserts or specialty taps mid-job. The included installation and tang break-off tools help you finish repairs cleanly the first time, reducing rework and downtime.

• Single kit replaces multiple separate purchases
• Organized layout accelerates size selection and workflow
• Tools and inserts sized for repeatable, consistent repairs
• Portable case keeps everything handy between jobs

Who is this for? The Orion Motor Tech 344-piece Thread Repair Kit is suited for professional mechanics, small repair shops, fleet maintenance teams and serious DIYers who need a dependable kit to repair stripped internal threads on engines, gearboxes, housings and equipment. If you frequently encounter worn or damaged bolt holes or want to upgrade weak threads to stronger coil inserts, this kit supplies the parts and tools to complete those jobs with confidence.