Hi-Viz 4 1/2" NH / NST Fire Hydrant Cap (Out of Service)
4 1/2" Male Fire Hydrant
- Outside diameter of a male NH / NST adapter - 5.760 inches (4 Threads per inch)
Iron 2 1/2" NH / NST Fire Hydrant Cap
2 1/2" Male Fire Hydrant
- Inside diameter of a male adapter - 2 1/2" inches
- Outside diameter of a male NH / NST adapter - 3.06 inches (7.5 Threads per inch)
- Outside diameter a male NPSH or NPT adapter - 2.84 inches (8 Threads per inch)
Iron 4 1/2" NH / NST Fire Hydrant Cap
4 1/2" Male Fire Hydrant
- Outside diameter of a 4.5" male NH / NST adapter - 5.760 inches (4 Threads per inch)
Yellow Plastic 4 1/2" NH Fire Hydrant Cap
Garden Hose Thread Male Adapter
- Outside diameter of a male GHT adapter - 1.06 inches (11.5 Threads per inch)
1" Male Adapter
- Inside diameter of a male adapter - 1 inch
- Outside diameter of a male NH / NST adapter - 1.375 inches (8 Threads per inch)
- Outside diameter a male NPSH or NPT adapter - 1.295 inches (11.5 Threads per inch)
1 1/2" Male Adapter
- Inside diameter of a male adapter - 1 1/2" inches
- Outside diameter of a male NH / NST adapter - 1.99 inches (9 Threads per inch)
- Outside diameter a male NPSH or NPT adapter - 1.87 inches (11.5 Threads per inch)
1 3/4" Hose Couplings
- 1 3/4 inch hoses come with 1 1/2 inch couplings
2" Male Adapter
- Inside diameter of a male adapter - 2 inch
- Outside diameter of a male NH / NST adapter - 2.51 inches (8 Threads per inch)
- Outside diameter a male NPSH or NPT adapter - 2.35 inches (11.5 Threads per inch)
Note - 2 inch NH or NST is very rare. If the outside diameter of male adapter is approximately two inches, you need 1 1/2 inch NH or NST.
2 1/2" Male Adapter
- Inside diameter of a male adapter - 2 1/2" inches
- Outside diameter of a male NH / NST adapter - 3.06 inches (7.5 Threads per inch)
- Outside diameter a male NPSH or NPT adapter - 2.84 inches (8 Threads per inch)
3" Hose Couplings
- Most 3 inch hoses come with 2 1/2 inch couplings
4" Male Adapter
- Inside diameter of a male adapter - 4" inches
- Outside diameter of a male NH / NST adapter - 5.01 inches (4 Threads per inch)
- Outside diameter a male NPSH or NPT adapter - 4.47 inches (8 Threads per inch)
5" Male Adapter
- Inside diameter of a male adapter - 5" inches
- Outside diameter of a male NH / NST adapter - 6.26 inches (4 Threads per inch)
6" Male Adapter
- Inside diameter of a male adapter - 6" inches
- Outside diameter of a male NH / NST adapter - 7.025 inches (4 Threads per inch)
