338-Piece Thread Repair Kit, Metric & SAE
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338-Piece Thread Repair Kit, Metric & SAE2676234326762344267623452676234626762347267623482676234926762350

338-Piece Thread Repair Kit, Metric & SAE

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HomeDIYer
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By HomeDIYer®

Price:
$104.48 USD $110.92 USD
Stock:
In stock (571 units), ready to be shipped

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Description

Overview

A stripped threaded hole does not always mean replacing the whole component. This 338-piece thread repair kit provides drills, taps, coil inserts, and installation tools for restoring damaged internal threads in metric and SAE sizes. Steel cutting tools prepare the hole, while 304 stainless steel inserts provide replacement threads for a correctly matched fastener.

Compatibility

Listed metric sizes: M5, M6, M8, M10, and M12. Listed SAE diameters: 1/4 in., 5/16 in., 3/8 in., 7/16 in., and 1/2 in. Supplier-listed workpiece materials include aluminum, iron, carbon steel, bronze, and magnesium.

Thread pitches, SAE threads per inch, and insert lengths are not specified in the supplied listing. Confirm these details before ordering. Diameter alone does not establish fit, and the workpiece must have sufficient material for drilling and tapping.

Key Features

  • 338-piece assortment brings thread repair tools and inserts together for workshop use.
  • Metric and SAE diameter coverage supports repairs across different fastener systems.
  • 304 stainless steel coil inserts replace damaged internal threads.
  • Heat-treated steel drills and taps have a supplier-stated hardness of HRC 55–62.
  • Installation and tang-breaking tools support the drill, tap, insert, and tang-removal workflow.
  • A rubber-coated grip on the insert tool provides a covered holding surface during installation.

What's in the Box

The 338-piece kit includes the following component types. Individual quantities per size are not specified.

  • Twist drills
  • Thread repair taps
  • 304 stainless steel thread inserts
  • Tang-breaking tools
  • Installation tools
  • Hex key

Who Is This For?

Mechanics repairing stripped threaded holes in suitable automotive components.

Equipment maintenance teams and experienced DIY users who can identify thread pitch and carry out accurate drilling and tapping.

Technical Specifications

Kit Type Coil-insert internal thread repair kit
Total Piece Count 338
Thread Systems Metric and SAE
Listed Metric Sizes M5, M6, M8, M10, M12
Listed SAE Diameters 1/4 in., 5/16 in., 3/8 in., 7/16 in., 1/2 in.
Thread Pitch / TPI Contact us to confirm
Insert Lengths Contact us to confirm
Insert Material 304 stainless steel
Drill and Tap Material Heat-treated steel
Drill and Tap Hardness HRC 55–62, supplier stated
Listed Overall Dimensions 14.96 × 12.20 × 3.94 in.
Listed Product Weight 7.64 lb

Frequently Asked Questions

Which metric sizes are included?

The listed metric sizes are M5, M6, M8, M10, and M12. Exact thread pitches are not provided; contact us to confirm the pitch needed for your repair.

Which SAE sizes are included?

The listed diameters are 1/4 in., 5/16 in., 3/8 in., 7/16 in., and 1/2 in. Confirm the threads per inch before purchase; the listing does not establish UNC or UNF coverage.

What are the inserts made from?

The coil thread inserts are made from 304 stainless steel. The drills and taps are heat-treated steel.

How does a coil-insert repair work?

The general sequence is to drill the damaged hole, tap it with the matching repair tap, install the correct insert, and remove its tang where required. Follow the tool instructions and component repair requirements for dimensions and installation depth.

Can I use it on aluminum or steel?

The supplier lists aluminum, iron, carbon steel, bronze, and magnesium as intended workpiece materials. Suitability also depends on material condition, hole location, and remaining wall thickness.

Does it repair every engine thread?

No universal engine compatibility is established. Confirm diameter, pitch, insert length, access, and the component manufacturer's repair requirements. Safety-critical repairs should be assessed by a qualified technician.

Are quantities for each insert size available?

The supplied listing gives a total of 338 pieces but does not specify counts for each size. Contact us to confirm if you need a particular quantity or insert length.

Match your thread diameter, pitch, and required insert length before ordering. See current offers at checkout.

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