Orion Motor Tech 172‑pc SAE Thread Repair Kit — 1/4"–1/2" Wire Insert Set with HSS Drills & Taps

Orion Motor Tech's 172-piece SAE Thread Repair Kit is a complete rethreading set that restores stripped or damaged threads using wire thread inserts for sizes 1/4" to 1/2".

Whether you're repairing engine blocks, aluminum housings, or steel components, this all-in-one kit supplies drills, taps, inserts, installation tools and tang break-off drivers sized to the most common SAE threads. The tools are heat-treated high-speed steel with a corrosion-resistant finish, housed in a blow-molded case so you can carry, sort, and protect everything between jobs.

How will this kit repair stripped threads fast?

The kit repairs by removing damaged threads with a precision drill and tap, then installing a coil insert that creates new, durable threads. Inserts restore strength and recover oversized or worn holes without welding or replacing parts.

• Includes 135° drill bits matched to each tap for accurate hole preparation
• Screw taps cut the proper pilot thread for the wire inserts
• 150 wire inserts provide corrosion-resistant, wear-resistant new threads
• Installation tools seat inserts cleanly; tang break tools finish the job

Which sizes and parts are included in the set?

This 172-piece SAE kit covers the five most commonly needed sizes: 1/4", 5/16", 3/8", 7/16", and 1/2". It groups the required components so each repair has the matching drill, tap, insert count and installation tools.

• 5 drill bits and 5 screw taps sized to match each SAE thread
• 150 wire thread inserts spread across the five sizes for multiple repairs
• 10 installation and tang break-off tools for simple, repeatable installs
• Blow-molded storage case to organize and protect components

Is this kit durable and suitable for professional use?

Yes — the drills and taps are made from heat-treated high-speed steel and finished to resist corrosion, offering long tool life under frequent use. The inserts and tools tolerate aluminum, iron, carbon steel and many common materials, making the set appropriate for home mechanics and pros alike.

• Heat-treated high-speed steel for wear resistance and strength
• Corrosion-resistant finish extends service life in shop environments
• Designed for repeated use across automotive, industrial and DIY repairs
• Organized case reduces tool loss and speeds up job setup

How easy is it to use this set if I'm not a professional?

The kit is designed for straightforward, repeatable steps: drill, tap, insert, and break off the tang. Clear matching parts and the included installation tools reduce guesswork, so even occasional users can achieve reliable results.

• Color-coded/numbered layout in the case for quick part selection
• Installation tools seat inserts to the correct depth consistently
• Tang break-off drivers ensure a flush finish ready for fasteners
• Instructions and part matching minimize trial-and-error repairs

Who is this for: This Orion Motor Tech 172pc SAE Thread Repair Kit is ideal for automotive technicians, maintenance crews, hobby mechanics, and DIY homeowners who need a reliable, ready-to-use solution for restoring stripped or damaged threads in engines, housings, and structural parts. If you work with aluminum, steel, or carbon materials and want to avoid part replacement or welding, this kit gives you the drills, taps, inserts and tools to complete professional-looking thread repairs on the spot.