You would need to just screw this adaptor to existing female thread and you will end up with male NPT standard thread or other way round. This tolerance may not apply in localized areas of formed fittings where increased wall thickness is required to meet design requirements of ASME B16.

Thread Reducers and Adaptors | Thread Adapter and Reduction Thread Reducers and Adaptors | Thread Adapter and Reduction

You'll find the fitting in home and industrial settings, such as kitchens, factory floors and gardens. Pipe fitting adaptor which will let you convert the BSP (European) thread to NPT (American) standard thread. Threaded pipe reduction nipple fitting for installation in water supply and central heating systems. Unless otherwise specified by the purchaser, these tolerances apply to the nominal inside diameter, which equals the difference between the nominal outside diameter and twice the nominal wall thickness. The other end of the pipe has a half-inch female BSP connector for attaching to a component with a male fitting.This material also resists rust and tarnishing, even in damp and warm environments for a longer-lasting product. com/p/Charlotte-Pipe-1-in-x-3-4-in-PVC-Schedule-40-Reducer-Bushing-PVC-02112-2000HD/203850938" on this server. BSP thread 1/2 Inch to NPT thread 1/2 Inch - threaded pipe fitting adaptor which will let you convert the BSP(UK) or G (European) thread to NPT American standard thread or other way round. Female threaded reducing coupling muff for installation in water supply and central heating systems.

Imperial 4 - 3 Inch Reducer No Crimp | The Home Depot Canada Imperial 4 - 3 Inch Reducer No Crimp | The Home Depot Canada

Will comply with Building Regulation Part F if installed in accordance with the manufacturer's instructions and by a competent person. Reduction connection - Application: for installation in water mains and central heating systems; - Size: 3/8" x 1/2" and 3/8" x 3/4"; - Thread type: Female x Male. There's a 3/4 inch BSP (British Standard Pipe) male fitting at one end of the straight reducer, so you can attach it to a component with a female connector.