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Red blue black case holding 338-piece thread repair kit with drill bits taps inserts tools

VEVOR

VEVOR Helicoil Thread Repair Kit 338-Piece SAE Metric XRGY338

SKU CH-7RQB-VBPN5

Restores damaged threads with a 338-piece SAE and metric kit using HSS drill bits, taps and 304 stainless-steel inserts hardened to HRC 55-62

  • TypeOther Appliances
  • Width11.61
  • Heat-treated HSS drill bits and taps at HRC 55-62 for lasting durability
  • 304 stainless steel thread inserts resist corrosion and wear over time
  • 338-piece kit covers SAE and metric sizes for broad compatibility
  • Includes drills, taps, inserts, break-off and installation tools in one set
  • Simple drill-tap-insert-break process restores damaged threads quickly

338-Piece Thread Repair Kit

This VEVOR Helicoil kit contains 338 pieces covering both SAE and metric thread sizes. It includes drill bits, taps, stainless-steel inserts, break-off tools and a hex key. The components are designed for restoring damaged threads in automotive and general mechanical work.

For automotive and workshop thread restoration

The kit suits mechanics and DIYers who need to repair stripped or damaged threads in engine blocks, cylinder heads or general hardware. It covers metric sizes M5 through M12 and SAE sizes from 1/4" to 1/2". Buyers needing larger diameters, finer pitches or specialised spark-plug inserts should look elsewhere.

Straightforward drill-tap-insert-break workflow

Each repair follows a four-step process: drill the damaged hole, tap new threads, wind in the 304 stainless-steel coil, then snap off the tang with the supplied tool. Drill bits and taps are heat-treated HSS at HRC 55-62 for long life. The main difficulty is keeping the tap perfectly aligned during hand tapping to avoid cross-threading the new hole.

Highlights

  • Heat-treated HSS drill bits and taps at HRC 55-62 for lasting durability
  • 304 stainless steel thread inserts resist corrosion and wear over time
  • 338-piece kit covers SAE and metric sizes for broad compatibility
  • Includes drills, taps, inserts, break-off and installation tools in one set
  • Simple drill-tap-insert-break process restores damaged threads quickly

Specifications

TypeOther Appliances
Width11.61

Questions about this item

What thread sizes are covered by the 338-piece kit for engine repairs?

The kit covers SAE sizes 1/4", 5/16", 3/8", 7/16", 1/2" and metric sizes M5, M6, M8, M10, M12.

Will the HSS drill bits and taps withstand repeated use on hardened bolts?

Drill bits and taps are heat-treated to HRC 55-62 for superior durability during repeated thread restoration.

How do I verify the stainless-steel inserts are seated correctly after breaking the tang?

After tang break-off, the new 304 stainless-steel thread should accept the matching bolt with smooth engagement and full depth.

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