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.
More
About Metal Tubing
More
Smooth-Bore Seamless Steel Tubing

Seamless construction with no weld bead gives this tubing a smooth interior for unrestricted flow. It is stronger than welded tubing and can be flared without splitting. Do not use in corrosive environments.
For technical drawings and 3-D models, click on a part number.
- Temperature Range: See Table
- Bending Method: Tube Bender
- For Use With: Hydraulic Fluid, Natural Gas
- Compatible Tubing Fittings: Compression and Flared
OD | Wall Thick. | ID | Max. Pressure | Temperature Range, °F | Temper Rating | Specifications Met | 3 ft. | 6 ft. | |
Steel | |||||||||
---|---|---|---|---|---|---|---|---|---|
3/16" | 0.035" | 0.118" | 3,600 psi @ 72° F | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
1/4" | 0.035" | 0.18" | 2,700 psi @ 72° F | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
1/4" | 0.049" | 0.152" | 3,800 psi @ 72° F | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
1/4" | 0.065" | 0.12" | 5,100 psi @ 72° F | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
5/16" | 0.035" | 0.243" | Not Rated | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
3/8" | 0.035" | 0.305" | 1,800 psi @ 72° F | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
3/8" | 0.049" | 0.277" | 2,500 psi @ 72° F | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
3/8" | 0.065" | 0.245" | 3,400 psi @ 72° F | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
1/2" | 0.035" | 0.43" | 1,300 psi @ 72° F | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
1/2" | 0.049" | 0.402" | 1,900 psi @ 72° F | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
1/2" | 0.065" | 0.37" | 2,500 psi @ 72° F | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
1/2" | 0.083" | 0.334" | 3,200 psi @ 72° F | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
5/8" | 0.035" | 0.555" | 1,100 psi @ 72° F | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
5/8" | 0.049" | 0.527" | 1,600 psi @ 72° F | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
5/8" | 0.065" | 0.495" | Not Rated | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
5/8" | 0.083" | 0.459" | Not Rated | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
3/4" | 0.049" | 0.652" | 1,300 psi @ 72° F | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
3/4" | 0.065" | 0.62" | 1,800 psi @ 72° F | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
3/4" | 0.083" | 0.584" | 2,300 psi @ 72° F | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
3/4" | 0.095" | 0.56" | Not Rated | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
1" | 0.049" | 0.902" | 1,000 psi @ 72° F | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
1" | 0.065" | 0.87" | 1,300 psi @ 72° F | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
1" | 0.083" | 0.834" | 1,700 psi @ 72° F | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
1" | 0.095" | 0.81" | Not Rated | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 | ||
1 1/4" | 0.12" | 1.01" | Not Rated | -65° to 800° | Soft | ASTM A179, SAE J524 | 00000000 |
Corrosion-Resistant Steel Tubing

- Temperature Range: -20° to 800° F
- Bending Method: Tube Bender
- Compatible Tube Fittings: Compression and Flared
A thin layer of zinc yellow-chromate gives this tubing extra corrosion resistance, making it an economical alternative to stainless steel. Tubing is seamless, which provides a smooth interior for unrestricted flow. It is stronger than welded tubing and can be flared without splitting.
For technical drawings and 3-D models, click on a part number.
OD | Wall Thick. | ID | Max. Pressure | Temper Rating | 1 ft. | 3 ft. | 6 ft. | |
For Use With Hydraulic Fluid, Oil, Salt Water, Water | ||||||||
---|---|---|---|---|---|---|---|---|
3/16" | 0.035" | 0.118" | 3,600 psi @ 72° F | Soft | 0000000 | |||
1/4" | 0.035" | 0.18" | 2,700 psi @ 72° F | Soft | 0000000 | |||
5/16" | 0.035" | 0.243" | 2,200 psi @ 72° F | Soft | 0000000 | |||
3/8" | 0.035" | 0.305" | 1,800 psi @ 72° F | Soft | 0000000 | |||
3/8" | 0.049" | 0.277" | 2,500 psi @ 72° F | Soft | 0000000 | |||
3/8" | 0.065" | 0.245" | 3,400 psi @ 72° F | Soft | 0000000 | |||
1/2" | 0.035" | 0.43" | 1,300 psi @ 72° F | Soft | 0000000 | |||
1/2" | 0.049" | 0.402" | 1,900 psi @ 72° F | Soft | 0000000 | |||
1/2" | 0.065" | 0.37" | 2,500 psi @ 72° F | Soft | 0000000 | |||
5/8" | 0.065" | 0.495" | 2,000 psi @ 72° F | Soft | 0000000 | |||
3/4" | 0.083" | 0.584" | 2,300 psi @ 72° F | Soft | 0000000 | |||
1" | 0.095" | 0.81" | 1,900 psi @ 72° F | Soft | 0000000 |
Yor-Lok Fittings for Steel Tubing

- For Use With: Air, Cutting Oil, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Mineral Oil
- Tubing: Use with seamless steel
- Specifications Met: See table
A nut with two sleeves (ferrules) gives these fittings extra gripping power. The sleeves bite into tubing as you tighten the nut, creating a strong seal. Also known as instrumentation fittings, they are made to tight tolerances for use in high-precision applications. Fittings are zinc-plated steel for fair corrosion resistance. They are compatible with Swagelok®, Let-Lok, and A-Lok fittings.
For technical drawings and 3-D models, click on a part number.

For Tube | ||||||||
---|---|---|---|---|---|---|---|---|
OD | Wall Thick. | Pipe Size | Material | Max. Pressure | Temp. Range, °F | Specifications Met | Each | |
NPT Threads | ||||||||
1/8" | 0.035" | 1/8 | Zinc-Plated Steel | 6,800 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 0000000 | 000000 |
1/8" | 0.035" | 1/4 | Zinc-Plated Steel | 6,500 psi @ 72° F | -20° to 395° | ASTM A179 | 0000000 | 00000 |
3/16" | 0.035" | 1/8 | Zinc-Plated Steel | 6,700 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 0000000 | 00000 |
1/4" | 0.035" | 1/8 | Zinc-Plated Steel | 4,900 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 0000000 | 00000 |
1/4" | 0.035" | 1/4 | Zinc-Plated Steel | 4,900 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 0000000 | 00000 |
1/4" | 0.035" | 3/8 | Zinc-Plated Steel | 4,900 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 0000000 | 00000 |
1/4" | 0.035" | 1/2 | Zinc-Plated Steel | 4,900 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 0000000 | 00000 |
5/16" | 0.035" | 1/8 | Zinc-Plated Steel | 3,800 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 0000000 | 00000 |
5/16" | 0.035" | 1/4 | Zinc-Plated Steel | 3,800 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 0000000 | 00000 |
3/8" | 0.035" | 1/8 | Zinc-Plated Steel | 3,100 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 0000000 | 00000 |
3/8" | 0.035" | 1/4 | Zinc-Plated Steel | 3,100 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 0000000 | 00000 |
3/8" | 0.035" | 3/8 | Zinc-Plated Steel | 3,100 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 0000000 | 00000 |
3/8" | 0.035" | 1/2 | Zinc-Plated Steel | 3,100 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 0000000 | 00000 |
1/2" | 0.035" | 1/4 | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 0000000 | 00000 |
1/2" | 0.035" | 3/8 | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 0000000 | 00000 |
1/2" | 0.035" | 1/2 | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 0000000 | 00000 |
1/2" | 0.035" | 3/4 | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 0000000 | 00000 |
5/8" | 0.035" | 1/2 | Zinc-Plated Steel | 1,800 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 0000000 | 00000 |
3/4" | 0.049" | 1/2 | Zinc-Plated Steel | 2,200 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 0000000 | 00000 |
3/4" | 0.049" | 3/4 | Zinc-Plated Steel | 2,200 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 0000000 | 00000 |
1" | 0.065" | 1 | Zinc-Plated Steel | 2,100 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 0000000 | 000000 |

For Tube | |||||||
---|---|---|---|---|---|---|---|
OD | Wall Thick. | Material | Max. Pressure | Temp. Range, °F | Specifications Met | Each | |
1/4" | 0.035" | Zinc-Plated Steel | 4,900 psi @ 72° F | -20° to 395° | ASTM A179 | 00000000 | 000000 |
3/8" | 0.035" | Zinc-Plated Steel | 3,100 psi @ 72° F | -20° to 395° | ASTM A179 | 00000000 | 00000 |
1/2" | 0.035" | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 395° | ASTM A179 | 00000000 | 00000 |
5/8" | 0.035" | Zinc-Plated Steel | 1,800 psi @ 72° F | -20° to 395° | ASTM A179 | 00000000 | 00000 |
3/4" | 0.049" | Zinc-Plated Steel | 2,200 psi @ 72° F | -20° to 395° | ASTM A179 | 00000000 | 00000 |
1" | 0.065" | Zinc-Plated Steel | 2,100 psi @ 72° F | -20° to 395° | ASTM A179 | 00000000 | 000000 |

Inline tees are also known as branch tees.
For Tube | ||||||||
---|---|---|---|---|---|---|---|---|
OD | Wall Thick. | Pipe Size | Material | Max. Pressure | Temp. Range, °F | Specifications Met | Each | |
NPT Threads | ||||||||
1/4" | 0.035" | 1/8 | Zinc-Plated Steel | 4,900 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 00000000 | 000000 |
1/4" | 0.035" | 1/4 | Zinc-Plated Steel | 4,900 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 00000000 | 00000 |
3/8" | 0.035" | 1/4 | Zinc-Plated Steel | 3,100 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 00000000 | 00000 |
3/8" | 0.035" | 3/8 | Zinc-Plated Steel | 3,100 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 00000000 | 00000 |
1/2" | 0.035" | 3/8 | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 00000000 | 00000 |
1/2" | 0.035" | 1/2 | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 00000000 | 00000 |
5/8" | 0.035" | 1/2 | Zinc-Plated Steel | 1,800 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 00000000 | 00000 |

Inline tees are also known as branch tees.
For Tube | ||||||||
---|---|---|---|---|---|---|---|---|
OD | Wall Thick. | Pipe Size | Material | Max. Pressure | Temp. Range, °F | Specifications Met | Each | |
NPT Threads | ||||||||
1/4" | 0.035" | 1/4 | Zinc-Plated Steel | 4,900 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 00000000 | 000000 |
3/8" | 0.035" | 1/4 | Zinc-Plated Steel | 3,100 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 00000000 | 00000 |
1/2" | 0.035" | 1/4 | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 00000000 | 000000 |
1/2" | 0.035" | 3/8 | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 00000000 | 00000 |
1/2" | 0.035" | 1/2 | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 00000000 | 00000 |
3/4" | 0.049" | 3/4 | Zinc-Plated Steel | 2,200 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 00000000 | 000000 |

Right-angle tees are also known as run tees.
For Tube | ||||||||
---|---|---|---|---|---|---|---|---|
OD | Wall Thick. | Pipe Size | Material | Max. Pressure | Temp. Range, °F | Specifications Met | Each | |
NPT Threads | ||||||||
1/4" | 0.035" | 1/8 | Zinc-Plated Steel | 4,900 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 00000000 | 000000 |
1/4" | 0.035" | 1/4 | Zinc-Plated Steel | 4,900 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 00000000 | 00000 |
3/8" | 0.035" | 1/4 | Zinc-Plated Steel | 3,100 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 00000000 | 00000 |
3/8" | 0.035" | 3/8 | Zinc-Plated Steel | 3,100 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 00000000 | 000000 |
1/2" | 0.035" | 1/2 | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 395° | ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179 | 00000000 | 00000 |

For Tube | |||||||
---|---|---|---|---|---|---|---|
OD | Wall Thick. | Material | Max. Pressure | Temp. Range, °F | Specifications Met | Each | |
1/8" | 0.035" | Zinc-Plated Steel | 6,800 psi @ 72° F | -20° to 395° | ASTM A179 | 00000000 | 000000 |
1/4" | 0.035" | Zinc-Plated Steel | 4,900 psi @ 72° F | -20° to 395° | ASTM A179 | 00000000 | 00000 |
5/16" | 0.035" | Zinc-Plated Steel | 3,800 psi @ 72° F | -20° to 395° | ASTM A179 | 00000000 | 00000 |
3/8" | 0.035" | Zinc-Plated Steel | 3,100 psi @ 72° F | -20° to 395° | ASTM A179 | 00000000 | 00000 |
1/2" | 0.035" | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 395° | ASTM A179 | 00000000 | 00000 |
5/8" | 0.035" | Zinc-Plated Steel | 1,800 psi @ 72° F | -20° to 395° | ASTM A179 | 00000000 | 00000 |
3/4" | 0.049" | Zinc-Plated Steel | 2,100 psi @ 72° F | -20° to 395° | ASTM A179 | 00000000 | 00000 |
1" | 0.065" | Zinc-Plated Steel | 2,100 psi @ 72° F | -20° to 395° | ASTM A179 | 00000000 | 000000 |

For Tube | |||||||
---|---|---|---|---|---|---|---|
OD | Wall Thick. | Nut Material | Max. Pressure | Temp. Range, °F | Specifications Met | Each | |
1/8" | 0.035" | Zinc-Plated Steel | 6,800 psi @ 72° F | -20° to 395° | ASTM A108 | 00000000 | 00000 |
3/16" | 0.035" | Zinc-Plated Steel | 6,700 psi @ 72° F | -20° to 395° | ASTM A108 | 00000000 | 0000 |
1/4" | 0.035" | Zinc-Plated Steel | 4,900 psi @ 72° F | -20° to 395° | ASTM A108 | 00000000 | 0000 |
5/16" | 0.035" | Zinc-Plated Steel | 3,800 psi @ 72° F | -20° to 395° | ASTM A108 | 00000000 | 0000 |
3/8" | 0.035" | Zinc-Plated Steel | 3,100 psi @ 72° F | -20° to 395° | ASTM A108 | 00000000 | 0000 |
1/2" | 0.035" | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 395° | ASTM A108 | 00000000 | 0000 |
5/8" | 0.035" | Zinc-Plated Steel | 1,800 psi @ 72° F | -20° to 395° | ASTM A108 | 00000000 | 0000 |
3/4" | 0.049" | Zinc-Plated Steel | 2,200 psi @ 72° F | -20° to 395° | ASTM A108 | 00000000 | 0000 |
1" | 0.065" | Zinc-Plated Steel | 2,100 psi @ 72° F | -20° to 395° | ASTM A108 | 00000000 | 00000 |

For Tube | ||||||||
---|---|---|---|---|---|---|---|---|
OD | Wall Thick. | Front Sleeve Material | Back Sleeve Material | Max. Pressure | Temp. Range, °F | Specifications Met | Each | |
1/8" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 6,800 psi @ 72° F | -20° to 800° | ASME B31.3 | 00000000 | 00000 |
3/16" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 6,700 psi @ 72° F | -20° to 800° | ASME B31.3 | 00000000 | 0000 |
1/4" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 4,850 psi @ 72° F | -20° to 800° | ASME B31.3 | 00000000 | 0000 |
5/16" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 3,800 psi @ 72° F | -20° to 800° | ASME B31.3 | 00000000 | 00000 |
3/8" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 3,100 psi @ 72° F | -20° to 800° | ASME B31.3 | 00000000 | 00000 |
1/2" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 2,300 psi @ 72° F | -20° to 800° | ASME B31.3 | 00000000 | 00000 |
5/8" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 1,800 psi @ 72° F | -20° to 800° | ASME B31.3 | 00000000 | 00000 |
3/4" | 0.049" | Zinc-Plated Steel | 316 Stainless Steel | 2,150 psi @ 72° F | -20° to 800° | ASME B31.3 | 00000000 | 00000 |
1" | 0.065" | Zinc-Plated Steel | 316 Stainless Steel | 2,100 psi @ 72° F | -20° to 800° | ASME B31.3 | 00000000 | 00000 |