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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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 |
Low-Pressure Brass and Bronze Threaded Pipe Fittings
Use these fittings in low-pressure flow applications. They have good corrosion resistance.
Locknuts thread onto the male end of a fitting to provide extra holding power so the fitting won’t loosen from vibration. Locknuts that meet DIN 431 adhere to international standards for locknut dimensions.
For technical drawings and 3-D models, click on a part number.
- For Use With: See table
- Pressure Class: See table
- Specifications Met: See table
- Pipe Nipples and Pipe: See table
- Flanges: See table
For Pipe | For Flange | |||||||
|---|---|---|---|---|---|---|---|---|
| Pipe Size | Max. Pressure | Material | Material | Material | For Use With | Specifications Met | Each | |
BSPP Female | ||||||||
| 1/8 | Not Rated | Brass | Brass | Brass | Air, Natural Gas, Oil | DIN 431 | 0000000 | 00000 |
| 1/4 | Not Rated | Brass | Brass | Brass | Air, Natural Gas, Oil | DIN 431 | 0000000 | 0000 |
| 3/8 | Not Rated | Brass | Brass | Brass | Air, Natural Gas, Oil | DIN 431 | 0000000 | 0000 |
| 1/2 | Not Rated | Brass | Brass | Brass | Air, Natural Gas, Oil | DIN 431 | 0000000 | 0000 |
| 3/4 | Not Rated | Brass | Brass | Brass | Air, Natural Gas, Oil | DIN 431 | 0000000 | 0000 |
| 1 | Not Rated | Brass | Brass | Brass | Air, Natural Gas, Oil | DIN 431 | 0000000 | 00000 |
| 1 1/4 | Not Rated | Brass | Brass | Brass | Air, Natural Gas, Oil | DIN 431 | 0000000 | 00000 |
| 1 1/2 | Not Rated | Brass | Brass | Brass | Air, Natural Gas, Oil | DIN 431 | 0000000 | 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.
Locknuts thread onto the male end of a fitting to provide extra holding power so the fitting won’t loosen from vibration. Locknuts that meet DIN 431 comply with international standards for pipe fitting locknut dimensions.
NPTF (Dryseal) threads and NPSL (National Pipe Straight Locknut) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class:
NPSL: 150 - Fabrication:
NPSL: Heat Treated - Specifications Met:
NPSL: ANSI/MSS SP-114, ASTM A351
BSPP: DIN 431 - Pipe Nipples and Pipe:
NPSL: Use Schedule 40 stainless steel - Flanges:
NPSL: Use Class 150 stainless steel
304 Stainless Steel | ||||
|---|---|---|---|---|
| Pipe Size | Max. Pressure | Max. Steam Pressure | Each | |
BSPP Female | ||||
| 1/8 | Not Rated | Not Rated | 00000000 | 00000 |
| 1/4 | Not Rated | Not Rated | 00000000 | 0000 |
| 3/8 | Not Rated | Not Rated | 00000000 | 0000 |
| 1/2 | Not Rated | Not Rated | 00000000 | 0000 |
| 5/8 | Not Rated | Not Rated | 00000000 | 0000 |
| 3/4 | Not Rated | Not Rated | 00000000 | 0000 |
| 1 | Not Rated | Not Rated | 00000000 | 00000 |
Low-Pressure Iron and Steel Threaded Pipe Fittings
Use these fittings for low-pressure applications in noncorrosive environments.
Locknuts thread onto the male end of a fitting to provide extra holding power so the fitting won’t loosen from vibration. Some meet DIN 431, which is an international standard for pipe fitting locknut dimensions.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class:
NPT: 125
NPSL: 150 - Specifications Met:
NPT: ASME B1.20.1, ASME B16.4
NPSL: ASME B16.14
BSPP: DIN 431 - Pipe Nipples and Pipe:
NPT, NPSL: Use Schedule 40 steel
Breakaway Hose Couplings for Chemicals and Petroleum
Minimize chemical and petroleum spills during accidental disconnects, such as a driver pulling away during loading. These couplings have a shut-off valve on each half to stop flow when they’re separated. Attach one end to your hose and the other to a supply pipe or a second hose.
Aluminum couplings are lightweight and have good corrosion resistance.
3/4 NPT and 3/4 BSPP couplings can be reconnected without replacement parts.
For technical drawings and 3-D models, click on a part number.
- For Use With: See table
- Maximum Pressure: See table
- Temperature Range: See table
Pipe Size | ||||||||
|---|---|---|---|---|---|---|---|---|
| Plug | Socket | Max. Pressure | Temp. Range, °F | Repairable | For Use With | Each | ||
BSPP Female Threaded Pipe | ||||||||
Aluminum Plug and Socket | ||||||||
| A | 3/4 | 3/4 | Not Rated | -15° to 115° | Repairable | Diesel Fuel, Gasoline | 0000000 | 0000000 |
Thread Adapters for Drum Openings
Convert drum openings with metric or BSPP threads to a 2 NPT pipe size.
Inlet | Outlet | ||||||
|---|---|---|---|---|---|---|---|
| Pipe/Thread Size | Gender | Pipe Size | Gender | Seal Material | Max. Temp., °F | Each | |
Polypropylene Plastic | |||||||
| 2 BSPP | Male | 2 NPT | Female | EPDM Rubber | 125° | 0000000 | 000000 |