NST coupling: National Standard Thread, also known as National Hose (NH) thread, is one of the more common couplings used in fire equipment. The male and female straight (non-tapered) threads screw together and the connection is sealed with a gasket.
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ROCKER LUG EXPANSION RING COUPLING |
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SIZE |
BOWL |
THREAD |
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1 1/2" |
1 11/16", 1 3/4", 1 13/16', 1 15/16" |
NST(NH),NPSH, NPT |
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2" |
2 5/16", 2 3/8" |
NST(NH),NPSH, NPT |
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2 1/2" |
2 11/16", 2 3/4",2 13/16",2 15/16" |
NST(NH),NPSH, NPT |
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3" |
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NST(NH),NPSH, NPT |
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4" |
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NST(NH),NPSH, NPT |
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MATERIAL: |
ALUMINUM OR BRASS |
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