BIT Couplings | McMaster-Carr

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	Thread Type Thread Type	Show

BIT

	Thread Type Thread Type	Hide

	Pipe Size Pipe Size

2 1/2

	Fire Hose Trade Size Fire Hose Trade Size

2 1/2

	Type Type

	Adapter

	Gender Gender


Female	Male

	Material Material

Brass

	Connection Type Connection Type


Pipe	Hose

	Shape Shape

	Straight

	Connection Style Connection Style

Threaded

	For Use With For Use With

Water

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Length Length

3 Products

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