VÖLKEL Thread Repair Kits for spark plug threads M14x1,25, HexTap SP, 12,7 / 17,5mm, set of 11 pcs.

Use this spark plug thread repair kit for restoring damaged spark plug thread seats when a damaged internal thread must be rebuilt rather than only cleaned. The decisive selection points are repair size M14x1.25, insert length where stated, and the tools included in the kit.

VÖLKEL Thread Repair Kits for spark plug threads M14x1,25, H

Features and applications

Use this spark plug thread repair kit for restoring damaged spark plug thread seats when a damaged internal thread must be rebuilt rather than only cleaned. The decisive selection points are repair size M14x1.25, insert length where stated, and the tools included in the kit.

The thread designation must match the existing component before the repair or installation process starts. The kit should be selected by the component thread, available wall thickness, and the required installation workflow. Check the thread designation, tool stage, holder guidance, lubrication, and inspection method before work starts.

Applications

• repairing damaged internal M14x1.25 threads with the V-COIL repair process
• workshop and maintenance repairs where the original screw size should remain usable
• component repair in housings, covers, brackets, flanges, and similar metal parts
• selection by thread size, insert length, included tools, and required inspection method

Benefits

• kit structure keeps the repair workflow connected to M14x1.25
• coordinated preparation, STI tapping, insertion, and checking steps reduce the risk of mixing tools from different sizes
• insert repair can retain the original screw size when the component condition allows controlled preparation
• spark plug thread focus supports service repairs where the thread seat and installation depth must be controlled

Application limits

• A repair kit only works when the damaged component can be prepared correctly; replace the component or use a different repair method if alignment or remaining wall strength is not sufficient.

Step by step

1. Identify the damaged thread and confirm that the kit is the correct repair size for M14x1.25.
2. Secure the component so the preparation tool can follow the original thread axis.
3. Prepare the damaged hole with the drilling or cleaning step required by the kit workflow.
4. Cut the STI receiving thread with the included or specified repair tap.
5. Clean the hole and remove chips before the insert is installed.
6. Install the wire thread insert with the correct inserting tool until the seating position is reached.
7. Remove the tang where the selected insert system requires that step.
8. Check the repaired thread with the mating screw or inspection method used in your process.

Used together with

Each component in the kit has its own VÖLKEL item number for reordering.

• STI HexTap for M14x1.25 spark plug thread HSS-G - M 16 x 1.25: item 19001
• V-COIL Solid thread insert type SP M 14 x 1.25 - 12.7 mm: item 19138
• V-COIL Solid thread insert type SP M 14 x 1.25 - 17.5 mm: item 19139

How to choose

Confirm M14x1.25, the insert length, and every included tool before starting the repair.