It is also sometimes called National Pipe Thread, NPTF (F for Fuel), American Standard Taper, or simply "pipe".
Types of NPT adapters: male or female adapter
Product Standard : ISO 11926-3, SAE J514 and BS 5200
Size of NPT adapters size chart is 1/8 NPT, 1/4 NPT, 3/8 NP, 1/2 NPT, 3/4 NPT, 1" NPT etc.
Material: carbon steel, stainless steel or copper alloy
Shape of NPT fitting adapters: straight, Elbow, Tee, Cross, Reducer etc.
NPT fitting adapters to swivel fitting, metric adapter, bspp adapter, sae adapter etc.
ZN NPT FEMALE CROSS adapter dimensions as follows:
E F G H
A B C D