Cal-Van - Allstart 393-100 Spark Plug Thread Insert M16x1.5

The Cal-Van - Allstart 393-100 is a precision-engineered spark plug thread insert designed to repair damaged M16 x 1.5 spark plug threads in cylinder heads. This heavy-duty insert provides a permanent solution for stripped or cross-threaded spark plug holes, restoring proper thread engagement without requiring costly cylinder head replacement.

Key Features:

• M16 x 1.5 thread pitch for metric spark plug applications
• Restores damaged spark plug threads to original specifications
• Constructed from durable materials for long-lasting repair
• Eliminates need for expensive cylinder head replacement
• Professional-grade thread repair solution

This thread insert is an essential tool for automotive professionals and serious DIY mechanics dealing with stripped spark plug threads. The M16 x 1.5 specification makes it compatible with many metric spark plug applications commonly found in European and Asian vehicles.