Thread Type Thread Type |
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For Thread Type For Thread Type |
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For Use With For Use With |
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Shape Shape |
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![]() | Cap/Plug |
Connection Style Connection Style |
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Threaded |
DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Pipe Size Pipe Size |
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For Gender For Gender |
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Message Message |
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Seal Material Seal Material |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Maximum Opening Pressure Maximum Opening Pressure |
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Rocker-Lug Fire Hydrant Caps and Plugs


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 | ||||||
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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 |
Pin-Lug Fire Hydrant Caps

These caps are the fastest way to access fire hydrants and washdown equipment. They have a bracket that snaps into any type of 2 1/2 size female fire hose threads. Tap on one of the pin lugs to remove quickly in an emergency—the bracket will release the hold on the threads and the cap will fall off without breaking. Tighten with a hook-style spanner wrench (sold separately). Caps are aluminum, which is lightweight with good corrosion resistance.
For technical drawings and 3-D models, click on a part number.
For Fire Hose Trade Size | For Thread Type | Material | Lg. | Specifications Met | Each | |
Cap | ||||||
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2 1/2 | NPSH | Aluminum | 15/16" | UL Listed | 000000 | 000000 |
Diesel Fuel Tank Caps


Often used with trailers, compressors, and other equipment tanks, these caps meet Department of Transportation requirements. Caps have fusible plugs that will melt when the outside environment reaches their opening temperature.
Cap with vent will automatically open when the internal pressure reaches between 6.5 psi to 8.5 psi to relieve pressure.