Expansion Plugs - 1in 100pk

Pioneer Expansion Plugs - 1 inch 100-pack are designed for universal engine block applications, serving as closures for coolant passages during engine repair, restoration, or custom builds. These plugs are essential for engine builders, automotive restoration shops, and technicians performing engine overhauls or block modifications.

Manufactured from durable steel, these expansion plugs feature a zinc oxide coating that provides corrosion resistance specifically in coolant environments. The expansion design allows the plugs to seat firmly as engine temperatures change, creating a reliable seal without requiring permanent installation methods.

The 100-pack quantity ensures adequate inventory for shops and technicians managing multiple engine projects simultaneously. While these plugs are suitable for various engine configurations, users should assess their specific application needs to ensure compatibility.