1/2 Bpt Temp. Adapt.

The 1/2 NPT temperature adapter from AutoMeter is a precision brass fitting designed for mechanics, technicians, and engine builders who require reliable instrumentation connections on mechanical temperature gauges. This straight adapter bridges the gap between two different thread sizes—converting a 5/8-18 inch female connection to a 1/2 inch NPT male fitting—making it an essential component for custom gauge installations, engine rebuilds, and performance monitoring setups where standard ports don't align with your sensor's threaded coupling.

Constructed from natural brass, this adapter provides excellent corrosion resistance and reliable sealing under engine bay conditions. The straight-through design eliminates unnecessary bulk while maintaining full flow integrity—critical when measuring accurate coolant or oil temperature on high-performance and stock engines alike. At 0.13 lbs and compact dimensions (3.55 × 1 × 3.75 inches), this fitting installs discreetly in tight engine compartments without obstructing adjacent components. The NPT male threading ensures a secure, pressure-tight fit that won't weep or fail under thermal cycling stress.

This adapter is ideal for anyone retrofitting AutoMeter mechanical temperature gauges into custom builds, LS swaps, or vintage restorations where factory sensor bungs don't match your gauge's female connector. Installation requires only a wrench or socket; thread-sealing tape (PTFE) is recommended for leak-free operation. Whether you're diagnosing cooling system performance or monitoring engine health during track days, this brass adapter provides the dependable interface your temperature instrumentation demands.