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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High-Pressure Plated Brass Threaded Pipe Fittings
The plating on these brass fittings creates a shiny finish and provides extra protection in corrosive environments. Fittings have the strength to handle high-pressure applications.
Nickel-plated brass fittings provide better corrosion resistance than unplated brass fittings.
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through a wall or panel to create an inlet or outlet.
- For Use With: Air, Natural Gas, Oil, Water
Thread Size | Nickel-Plated Brass | ||||
|---|---|---|---|---|---|
| (A) | (B) | For Max. Wall Thick. | Max. Pressure | Each | |
Metric Male × Metric Female | |||||
| M10 × 1 mm | M5 × 0.8 mm | 0.276" | 1,080 psi @ 72° F | 00000000 | 00000 |
Low-Pressure Stainless Steel Threaded Pipe Fittings
Use these fittings in a low-pressure pipe line. 304 stainless steel fittings have very good corrosion resistance.
Low-Pressure Iron and Steel Threaded Pipe Fittings
Use these fittings for low-pressure applications in noncorrosive environments.
- For Use With: Air, Diesel Fuel, Gasoline, Oil, Steam, Water
- Pipe Nipples and Pipe: Use Schedule 40 steel
Pipe Size | ||||||
|---|---|---|---|---|---|---|
(A) | (B) | Lg. | Hex Wd. | Material | Each | |
NPT Male × NPT Female | ||||||
| 1 1/2 | 1/2 | 1 7/32" | 1 13/32" | Iron | 0000000 | 000000 |
| 1 1/2 | 3/4 | 1 5/16" | 1 23/32" | Iron | 0000000 | 00000 |
| 1 1/2 | 1 | 1 5/16" | 2" | Iron | 0000000 | 00000 |
| 2 | 3/8 | 1 5/16" | 1 25/64" | Iron | 0000000 | 00000 |
| 2 | 1/2 | 1 5/16" | 1 25/64" | Iron | 0000000 | 00000 |
| 2 | 3/4 | 1 3/8" | 1 21/32" | Iron | 0000000 | 00000 |
| 2 | 1 | 1 11/16" | 2 1/32" | Iron | 0000000 | 00000 |
| 2 | 1 1/4 | 1 9/16" | 2 21/32" | Iron | 0000000 | 00000 |
| 2 | 1 1/2 | 1 25/32" | 2 33/64" | Iron | 0000000 | 00000 |
| 2 1/2 | 2 | 1 25/32" | 3" | Iron | 0000000 | 00000 |
| 3 | 1 | 1 9/16" | 2 5/16" | Iron | 0000000 | 000000 |
| 3 | 1 1/2 | 1 21/32" | 2 45/64" | Iron | 0000000 | 00000 |
| 3 | 2 | 1 3/4" | 3 1/4" | Iron | 0000000 | 00000 |
| 4 | 1 | 1 7/8" | 2 7/8" | Iron | 0000000 | 00000 |
| 4 | 2 | 1 13/32" | 3 3/8" | Iron | 0000000 | 00000 |
| 4 | 2 1/2 | 2 11/32" | 4 21/64" | Iron | 0000000 | 000000 |
| 4 | 3 | 2 7/16" | 4 3/4" | Iron | 0000000 | 00000 |