Orion Motor Tech Thread Repair Kit 3/8-16 SAE — 15x 304 Stainless Inserts, HSS Drill & Tap

The Orion Motor Tech OMT 3/8"-16 Thread Repair Kit is a complete repair kit that restores stripped or worn internal threads using 15 stainless inserts, an HSS drill bit, installation and break-off tools, a screw tap, and a compact storage case.

If a bolt hole in an engine block, bracket, or component has become damaged, this kit provides the essential tools to rebuild the thread rather than replace the entire part. Designed for use on common metals like aluminum, iron, carbon steel, bronze, and magnesium, the set allows you to cut, fit, and secure a durable 304 stainless steel insert in the original hole size. The kit is intended for mechanics, DIYers, and fabricators who want a practical, portable solution for internal thread restoration.

How does the kit restore stripped 3/8"-16 threads?

Begin by drilling the damaged thread to the correct diameter using the included 135° HSS drill bit, then tap the hole to accept the insert. The installation tool seats the insert precisely, and the break-off tool removes the tang for a clean finish.

• HSS 135° drill bit drills the enlarged pilot hole for insert clearance
• Screw tap cuts new threads to match the insert’s outer diameter
• Installation tool winds the insert into place without cross-threading
• Break-off tool removes the installation tang for smooth bolt engagement

What materials can I repair with this set?

The insert system is suitable for many common metals where thread wear occurs, giving restored threads higher corrosion and strength resistance thanks to 304 stainless construction. It works best when following the correct drilling and tapping steps for each substrate.

• Aluminum and magnesium parts often found on engines and housings
• Iron and carbon steel components like brackets and plates
• Bronze fittings and other non-ferrous metals where thread reinforcement is needed
• Avoid use in extremely soft plastics unless reinforced appropriately

What tools and parts are included, and how do they speed the job?

The kit bundles the specialty tools you need to complete a repair without searching for extras. The HSS drill bit and high-quality tap match the inserts, while the installation and breaking tools make seating and finishing quick and repeatable.

• 15 x 304 stainless steel thread inserts sized for 3/8"-16 applications
• 1 x 135° HSS drill bit for clean, consistent holes
• 1 x screw tap sized for the insert’s outer thread form
• Installation tool, break-off tool, and hex wrench for fastening
• Durable storage case keeps everything organized on the bench or in the toolbox

How precise and durable is the repair compared to the original threading?

When installed following the instructions, the stainless inserts restore holding power and alignment close to or exceeding the original thread performance. 304 stainless offers corrosion resistance and long-term durability in many workshop and automotive settings.

• Insert material: 304 stainless steel for improved corrosion resistance
• Drill bit material: high-speed steel for accurate, long-lasting cuts
• Installation method ensures concentric seating and proper torque transfer
• Break-off tang design enables a flush interior for normal fastener use

Who this is for: The Orion Motor Tech OMT 3/8"-16 Thread Repair Kit is aimed at professional mechanics, home garage enthusiasts, restoration shops, and fleet maintenance crews who need a compact, reliable way to repair internal threads without replacing components. If you work on engines, machinery, or metal assemblies and want a practical, reusable solution for stripped threads, this kit supplies the matched tools and stainless inserts to get the job done efficiently.