Spark Plug Thread Repair Kit M12 x 1.25 4 Inserts HSS Tap

A spark plug thread repair kit for restoring damaged M12 x 1.25 spark plug threads without replacing the whole component. It includes an HSS steel tap with a 16mm hex drive and four insert lengths to suit different repair requirements.

Used for engine servicing, vehicle maintenance and garage repair work where spark plug threads have become worn, stripped or cross-threaded. Suitable for mechanics, workshops and experienced DIY users carrying out thread repair on compatible spark plug holes, helping get engines back into service with the correct thread size restored.

This spark plug thread insert kit is based around an M12 x 1.25 thread format, making it suitable where that thread size is required. Four insert lengths are included at 9.5mm, 11.1mm, 12.7mm and 19.1mm, giving useful choice depending on thread depth and repair condition. The supplied HSS steel tap is intended for cutting or restoring the thread before fitting the insert, while the 16mm hex drive gives a straightforward way to turn the tap with the appropriate tool. Having multiple insert sizes in one kit helps cover common repair situations and reduces the need to source parts separately when carrying out workshop repairs.

Spark plug thread repair kit specifications

• Thread size: M12 x 1.25 spark plug thread repair format.
• Tap material: HSS steel tap for thread repair work.
• Drive: 16mm hex drive for turning the tap with a suitable tool.
• Insert lengths: Includes 9.5mm, 11.1mm, 12.7mm and 19.1mm options.
• Application: Used for repairing damaged or worn spark plug threads.

A practical choice for regular maintenance and repair work.