BIT Hose Fittings | McMaster-Carr

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How to Identify and Measure Fittings

Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.

About Fire-Fighting Hose Threads

Fire-Fighting Hose Fittings

Connect these fittings to fire hydrants and washdown equipment. Made of brass, they have good corrosion resistance. Some have a hex in the middle so you can tighten them with a wrench.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads. BIT (British Instantaneous Thread) threads are commonly used in the United Kingdom, Ireland, India, Hong Kong, and parts of Canada. They’re also known as John Morris couplings.

For technical drawings and 3-D models, click on a part number.

Straight Adapter, NH/NST Male Threaded Hose x BIT Male Threaded Hose

Fire Hose Trade Size	Pipe Size	Material		Each
2 1/2	2 1/2	Brass	0000000	0000000

Straight Adapter, BIT Male Threaded Hose x NH/NST Female Threaded Hose

Pipe Size	Fire Hose Trade Size	Material		Each
2 1/2	2 1/2	Brass	0000000	0000000

Straight Adapter, BIT Female Threaded Hose x NPT Female Threaded Pipe

Pipe Size	Material		Each
2 1/2	Brass	0000000	0000000