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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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Rocker-Lug Fire Hydrant Caps and Plugs
Cap
Plug
The rocker lugs on these caps and plugs allow for easy gripping, so you can quickly close off fire hydrants and washdown equipment. Tighten with a hook-style spanner wrench (sold separately). Caps and plugs are brass for good corrosion resistance.
NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads. Chicago Fire Department threads are only compatible with other Chicago Fire Department threads.
| Fire Hose Trade Size | Thread Type | Material | Lg. | Chain Lg. | Each | |
Cap | ||||||
|---|---|---|---|---|---|---|
| 1 | NH/NST | Brass | 1 7/32" | 9" | 00000000 | 000000 |
| 1 1/2 | NH/NST | Brass | 1 1/8" | 9" | 00000000 | 00000 |
| 2 1/2 | NH/NST | Brass | 1 7/16" | 9" | 00000000 | 00000 |
Plug | ||||||
| 1 1/2 | NH/NST | Brass | 1 11/16" | 9" | 0000000 | 00000 |
| 2 1/2 | NH/NST | Brass | 2 3/32" | 9" | 0000000 | 00000 |
| 2 1/2 | Chicago Fire Department | Brass | 2 3/32" | 9" | 0000000 | 00000 |