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NPT fittings can be confusing because the nomenclature does not refer to the thread size. This page will help you identify which NPT fitting size you have.
These aluminum AN912-style fittings conform to JIC and SAE specifications. They are designed to let you install a smaller fitting in a larger port.
AN912 Aluminum Pipe Reducer Bushing
Inline Temp Gauge Adapter for 1.50 Hose, 3/8 NPT Female - Pegasus Auto Racing Supplies
This adapter has a 1/8 NPT female port to accept a fuel pressure sender or sampling port. The male 1/16 NPT threads fit in the Schrader valve port in
1/16 NPT Male to 1/8 NPT Female Adapter for Fuel Rail
This aluminum adapter makes it easy to install an electrical temperature gauge sender or warning light switch in a 3/8 ID hose. Includes adapter with
Setrab 1/8 NPT In-Line Gauge Adapter, 3/8 Barbs
Overly cooled oil robs an engine of power and can lead to increased wear and sludge formation. An oil thermostat allows the oil to bypass the cooler
Thermostatic Oil Control - NPT Ports
Pegasus Auto Racing Supplies @
Quick-Disconnect Plug to 3/8 NPT Female, 3000 Series
These handy adapters have female NPT threads in one end and a standard male AN fitting (JIC threads, 37° flare) on the other. They are designed to
Female NPT Pipe to Male AN Adapter
This aluminum adapter has a 1 NPT male fitting (1.30 OD taper x 11.5 threads per inch) on one side and a 16AN male fitting (1 5/16 - 12 threads,
Davies Craig Alloy EWP Adapter, 1 NPT Male to 16AN Male
Craig's Sling 4 Build Log
This steel brake adapter has a male 10x1.00mm DIN bubble flare (convex) fitting on one end and a 3AN male (3/8-24, 37° convex) on the other end. Sold
Male 10 x 1.0mm Metric Convex Seat to 3AN Male, Steel
BSP Male to BSP Male Adapter - Pegasus Auto Racing Supplies
Inline Temp Gauge Adapter for 3/4 Hose, 1/8 NPT Female - Pegasus Auto Racing Supplies
Male NPT Pipe to Female AN Swivel Adapter, Aluminum - Pegasus Auto Racing Supplies
Magnetic Plug, Steel, Hex Socket, 3/8 NPT - Pegasus Auto Racing Supplies