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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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Extreme-Pressure Steel Threaded Pipe Fittings
The strongest steel fittings we offer, these can withstand extreme-pressure applications.
Galvanized and zinc-plated steel fittings have better corrosion resistance than plain steel fittings. UN/UNF (SAE Straight) male threads have a gasket to protect against leaks. They are also known as O-ring boss threads.
For technical drawings and 3-D models, click on a part number.
Plugs with Hex Drive
UN/UNF
(SAE Straight) Male
Threads with Gasket
(SAE Straight) Male
Threads with Gasket
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Temperature Range:
Buna-N Rubber: -20° to 200° F
Fluoroelastomer Rubber: -4° to 400° F - Specifications Met: ASTM B633, SAE J1926
- Pipe Nipples and Pipe: Use Schedule XXH steel
- Flanges: Use Class 1500 steel
Buna-N Rubber Gasket | Fluoroelastomer Rubber Gasket | |||||||
|---|---|---|---|---|---|---|---|---|
Thread Size | Dash Size | Drive Size | Max. Pressure | Material | Each | Each | ||
UN/UNF (SAE Straight) Male | ||||||||
| 5/16"-24 | 02 | 1/8" | 5,500 psi @ 72° F | Zinc-Plated Steel | 0000000 | 00000 | 0000000 | 00000 |
| 7/16"-20 | 04 | 3/16" | 5,000 psi @ 72° F | Zinc-Plated Steel | 0000000 | 0000 | 0000000 | 0000 |
| 9/16"-18 | 06 | 1/4" | 4,000 psi @ 72° F | Zinc-Plated Steel | 0000000 | 0000 | 0000000 | 0000 |
| 3/4"-16 | 08 | 5/16" | 3,500 psi @ 72° F | Zinc-Plated Steel | 0000000 | 0000 | 0000000 | 0000 |
| 7/8"-14 | 10 | 3/8" | 2,700 psi @ 72° F | Zinc-Plated Steel | 0000000 | 0000 | 0000000 | 0000 |
| 1 1/16"-12 | 12 | 9/16" | 2,200 psi @ 72° F | Zinc-Plated Steel | 0000000 | 0000 | 0000000 | 0000 |
| 1 5/16"-12 | 16 | 5/8" | 2,000 psi @ 72° F | Zinc-Plated Steel | 0000000 | 00000 | 0000000 | 00000 |
| 1 5/8"-12 | 20 | 3/4" | 1,600 psi @ 72° F | Zinc-Plated Steel | 0000000 | 00000 | 0000000 | 00000 |
| 1 7/8"-12 | 24 | 3/4" | 1,200 psi @ 72° F | Zinc-Plated Steel | 0000000 | 00000 | 0000000 | 00000 |