12mm X 1.75 Thread Cleaning Tap 6in OAL

The 12mm X 1.75 Thread Cleaning Tap 6in OAL from ARP is an essential tool for any mechanic or automotive enthusiast working with precision engine building, head porting, or fastener installation. This metric tap is purpose-built to clean, chase, and restore damaged or contaminated threads in critical engine components, cylinder heads, and block applications where thread integrity directly impacts reliability and performance. Whether you're rebuilding a performance engine, restoring vintage machinery, or maintaining high-horsepower builds, a quality thread cleaning tap prevents costly rework and ensures proper fastener seating.

ARP's thread cleaning tap features a 12mm metric diameter with a 1.75mm pitch, making it compatible with M12 x 1.75 fastener applications common in European and high-performance engine platforms. The 6-inch overall length provides excellent reach into recessed bores and deep engine cavities without binding or deflection. The flute design and hardened steel construction allow controlled cutting action that removes debris, corrosion, and minor thread damage while re-establishing clean, uniform thread geometry. Proper use with cutting fluid ensures smooth operation and extends tool life, critical when working with aluminum heads or cast iron blocks where thread stripping risk is highest.

This tap is indispensable for engine builders, machine shops, and serious DIY mechanics tackling head gasket replacement, stud installation, or any work requiring thread restoration on metric applications. ARP's reputation for precision tooling means this tap maintains tight tolerances and consistent performance across repeated use. Before installation, always verify the correct thread pitch and apply quality cutting fluid to prevent galling; hand-turning a cleaning tap is far safer than powered operation, giving you tactile feedback to detect binding or cross-threading before damage occurs. Compatible with standard tap wrenches and holders, this tool belongs in every serious automotive technician's inventory.