Stainless Steel NPT to AN Adapter.
1/4" NPT Male to -4AN Male.
Aeroflow Performance have designed this 304 stainless steel 1/4" NPT to -3AN and -4AN for applications such as turbochargers and radiator necks. Being a 304 stainless steel it can withstand extreme heat and is high strength compared to the standard alloy fitting which can break over time in racing applications.