Kastar 1010 Spark Plug Thread Chaser M10 x M14

The Kastar 1010 Spark Plug Thread Chaser is a dual-size thread chasing tool designed to restore and clean spark plug threads in cylinder heads. Compatible with both M10 x 1.0mm and M14 x 1.25mm spark plug thread sizes, this single tool services the majority of automotive, motorcycle, and powersports engines on the market today.

Thread chasers differ from taps — they clean, straighten, and restore existing threads without removing metal, making them the preferred choice for spark plug bore maintenance. This tool clears away carbon buildup, dirt, corrosion, and metal particles that accumulate over time and can cause spark plugs to seize or cross-thread during installation.

Key Features:

• Restores and cleans M10 x 1.0mm and M14 x 1.25mm spark plug threads
• Removes carbon deposits, dirt, and metal particles from thread bores
• Tapered ends allow easy, accurate thread entry and alignment
• Rubber O-ring holds the chaser securely in the socket during use
• Use with a standard 5/8" hex deep-well socket
• Hardened steel construction for durability and long service life
• Services most major automotive, motorcycle, and powersports platforms

Also sold under the Lang Tools brand (same manufacturer). The Kastar 1010 is an essential shop tool for any technician performing tune-ups or spark plug service, helping prevent costly cylinder head damage caused by dirty or compromised threads.