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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How to Install Helical Inserts
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About Helical Insert Length
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Stainless Steel Helical Inserts
Also known as Heli-Coil inserts, these inserts have coils that expand once installed to securely anchor the insert. All have a prong for ease of installation. An installation tool grips the prong and reduces the coil diameter, enabling the insert to fit in tapped holes. Remove the prong to insert the screw. Installation requires a drill bit, a helical insert tap, an installation tool, and a prong break-off tool.
For technical drawings and 3-D models, click on a part number.
Inserts | Through-Hole Taps | Installation Tools | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size  | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | Pkg. Qty. | Pkg. | Each | Each | |||
18-8 Stainless Steel—Right-Hand Threaded | ||||||||||
| 1/8 | 0.188" | 25/64" | 25/64" | 1 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
| 1/4 | 3/8" | 17/32" | 17/32" | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 |
| 3/8 | 0.562" | 43/64'' | 43/64" | 1 | 000000000 | 0000 | 000000000 | 000000 | 000000000 | 00000 |
| 1/2 | 3/4" | 27/32" | 27/32" | 1 | 000000000 | 0000 | 000000000 | 000000 | 000000000 | 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 |
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
Thread Adapters for Drum Openings
Convert drum openings with metric or BSPP threads to a 2 NPT pipe size.
For technical drawings and 3-D models, click on a part number.
Inlet | Outlet | |||||
|---|---|---|---|---|---|---|
| Pipe/Thread Size | Gender | Pipe Size | Gender | Max. Temp., °F | Each | |
316 Stainless Steel | ||||||
| 2 BSPP | Male | 2 NPT | Female | 250° | 0000000 | 0000000 |