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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.
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About Fire-Fighting Hose Threads
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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.
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 |