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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Universal-Thread Plated Brass Pipe Fittings
When you're unsure of the exact thread type you need, these fittings have universal threads that are compatible with the most common ones (NPT, NPTF, BSPP, BSPT). Made of nickel-plated brass, they resist corrosion better than plain brass fittings. A reusable Buna-N O-ring protects against leaks.
Connectors, adapters, and reducers all have a hex-shaped body, so you can tighten them with a wrench.
Fittings that swivel until tightened rotate for easy installation and reduce stress on the connecting parts when tightening them. The swivel is not meant to be continuously used like 360° swivel fittings.
NPTF (Dryseal) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Hydraulic Fluid, Oil, Water
- Fabrication: Machined
Pipe Size | Hex Wd. | |||||||
|---|---|---|---|---|---|---|---|---|
(A) | (B) | Max. Pressure | (A) | (B) | Material | O-Ring Material | Each | |
Universal, NPT, NPTF, BSPP, BSPT Male Threads | ||||||||
| 1/4 | 1/8 | 1,400 psi @ 72° F | 5/8" | 9/16" | Nickel-Plated Brass | Buna-N Rubber | 0000000 | 00000 |
| 3/8 | 1/4 | 1,000 psi @ 72° F | 13/16" | 5/8" | Nickel-Plated Brass | Buna-N Rubber | 0000000 | 0000 |
| 1/2 | 1/4 | 700 psi @ 72° F | 13/16" | 5/8" | Nickel-Plated Brass | Buna-N Rubber | 0000000 | 0000 |
- For Use With: Air, Hydraulic Fluid, Oil, Water
- Fabrication: Machined
Pipe Size | |||||||
|---|---|---|---|---|---|---|---|
| (A) | (B) | Max. Pressure | Hex Wd. | Material | O-Ring Material (Male Connection) | Each | |
NPTF Female × Universal, NPT, NPTF, BSPP, BSPT Male Threads | |||||||
| 1/8 | 1/4 | 1,400 psi @ 72° F | 5/8" | Nickel-Plated Brass | Buna-N Rubber | 0000000 | 00000 |
| 1/4 | 1/8 | 1,400 psi @ 72° F | 9/16" | Nickel-Plated Brass | Buna-N Rubber | 0000000 | 0000 |
| 3/8 | 1/8 | 1,000 psi @ 72° F | 5/8" | Nickel-Plated Brass | Buna-N Rubber | 0000000 | 0000 |
| 3/8 | 1/4 | 1,000 psi @ 72° F | 5/8" | Nickel-Plated Brass | Buna-N Rubber | 0000000 | 0000 |
| 1/2 | 1/8 | 700 psi @ 72° F | 5/8" | Nickel-Plated Brass | Buna-N Rubber | 0000000 | 00000 |
| 1/2 | 1/4 | 700 psi @ 72° F | 5/8" | Nickel-Plated Brass | Buna-N Rubber | 0000000 | 00000 |
| 1/2 | 3/8 | 700 psi @ 72° F | 13/16" | Nickel-Plated Brass | Buna-N Rubber | 0000000 | 00000 |
| 3/4 | 3/8 | 1,200 psi @ 72° F | 13/16" | Nickel-Plated Brass | Buna-N Rubber | 0000000 | 00000 |
| 3/4 | 1/2 | 1,200 psi @ 72° F | 13/16" | Nickel-Plated Brass | Buna-N Rubber | 0000000 | 00000 |
Male-Female Round Universal Thread Adapters with Through Hole
Connect male- and female-threaded parts of different thread types and sizes, while allowing air, liquids, wire, or other thin materials to pass through. Attach your parts to these adapters and use a hex key to secure the connection. Made of 304 stainless steel, all will hold up in wet environments. O-rings on each side create a tight seal, making them good for vacuum and compressed-air applications.
For technical drawings and 3-D models, click on a part number.
Pipe Size | Thread Type | Thread Length | Gender | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (A) | (B) | Thread Size (B) | (A) | (B) | (A) | (B) | (A) | (B) | Hex Size | OD | Tensile Strength, psi | Hardness | O-Ring Material | Each | |
304 Stainless Steel | |||||||||||||||
| 3/8 | __ | 10-32, M5 | BSPP, BSPT, NPT, NPTF, Universal | BSPP, BSPT, NPT, NPTF, Metric, UNF, Universal | 0.25" | 9/64" | Male | Female | 13/64" | 27/32" | 73,000 | Rockwell B70 | Buna-N Rubber | 00000000 | 000000 |
| 3/8 | 1/4 | __ | BSPP, BSPT, NPT, NPTF, Universal | BSPP, BSPT, NPT, NPTF, Universal | 0.25" | 1/4" | Male | Female | 13/64" | 27/32" | 73,000 | Rockwell B70 | Buna-N Rubber | 00000000 | 00000 |
| 3/8 | 1/8 | __ | BSPP, BSPT, NPT, NPTF, Universal | BSPP, BSPT, NPT, NPTF, Universal | 0.25" | 1/4" | Male | Female | 13/64" | 27/32" | 73,000 | Rockwell B70 | Buna-N Rubber | 00000000 | 00000 |
Male Round Universal Thread Adapters with Through Hole
Join two female-threaded parts of various thread types and sizes, while allowing air, liquids, wire, or other thin materials to pass through. Attach your parts to these adapters and use a hex key to secure the connection. Made of 304 stainless steel, all will hold up in wet environments. O-rings on each side create a tight seal, making them good for vacuum and compressed-air applications.
For technical drawings and 3-D models, click on a part number.
Pipe Size | Thread Type | Thread Length | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (A) | (B) | Thread Size (B) | (A) | (B) | (A) | (B) | Hex Size | OD | Tensile Strength, psi | Hardness | O-Ring Material | Each | |
304 Stainless Steel | |||||||||||||
| 3/8 | __ | 10-32, M5 | BSPP, BSPT, NPT, NPTF, Universal | BSPP, BSPT, NPT, NPTF, Metric, UNF, Universal | 0.25" | 13/64" | 13/64" | 27/32" | 73,000 | Rockwell B70 | Buna-N Rubber | 00000000 | 000000 |
| 3/8 | 1/4 | __ | BSPP, BSPT, NPT, NPTF, Universal | BSPP, BSPT, NPT, NPTF, Universal | 0.25" | 1/4" | 13/64" | 27/32" | 73,000 | Rockwell B70 | Buna-N Rubber | 00000000 | 00000 |
| 3/8 | 1/8 | __ | BSPP, BSPT, NPT, NPTF, Universal | BSPP, BSPT, NPT, NPTF, Universal | 0.25" | 1/4" | 13/64" | 27/32" | 73,000 | Rockwell B70 | Buna-N Rubber | 00000000 | 00000 |
| 3/8 | 3/8 | __ | BSPP, BSPT, NPT, NPTF, Universal | BSPP, BSPT, NPT, NPTF, Universal | 0.25" | 1/4" | 13/64" | 27/32" | 73,000 | Rockwell B70 | Buna-N Rubber | 00000000 | 00000 |