Measure the threaded ends of your fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.
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 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 | 5929K71 | 000000 |
| 1/8" | 0.035" | 1/4 | Zinc-Plated Steel | 6,500 psi @ 72° F | -20° to 395° | ASTM A179 | 5929K37 | 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 | 5929K73 | 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 | 5929K74 | 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 | 5929K75 | 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 | 5929K76 | 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 | 5929K77 | 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 | 5929K78 | 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 | 5929K79 | 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 | 5929K81 | 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 | 5929K82 | 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 | 5929K83 | 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 | 5929K84 | 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 | 5929K85 | 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 | 5929K86 | 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 | 5929K87 | 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 | 5929K88 | 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 | 5929K91 | 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 | 5929K92 | 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 | 5929K93 | 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 | 5929K94 | 00000 |

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 | 5929K213 | 000000 |
| 3/8" | 0.035" | Zinc-Plated Steel | 3,100 psi @ 72° F | -20° to 395° | ASTM A179 | 5929K215 | 00000 |
| 1/2" | 0.035" | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 395° | ASTM A179 | 5929K216 | 00000 |
| 5/8" | 0.035" | Zinc-Plated Steel | 1,800 psi @ 72° F | -20° to 395° | ASTM A179 | 5929K217 | 00000 |
| 3/4" | 0.049" | Zinc-Plated Steel | 2,200 psi @ 72° F | -20° to 395° | ASTM A179 | 5929K218 | 00000 |
| 1" | 0.065" | Zinc-Plated Steel | 2,100 psi @ 72° F | -20° to 395° | ASTM A179 | 5929K219 | 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 | 5929K104 | 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 | 5929K105 | 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 | 5929K112 | 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 | 5929K113 | 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 | 5929K116 | 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 | 5929K117 | 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 | 5929K118 | 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 | 5929K135 | 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 | 5929K142 | 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 | 5929K145 | 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 | 5929K146 | 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 | 5929K147 | 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 | 5929K153 | 00000 |

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 | 5929K164 | 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 | 5929K165 | 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 | 5929K172 | 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 | 5929K173 | 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 | 5929K177 | 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 | 5929K221 | 000000 |
| 1/4" | 0.035" | Zinc-Plated Steel | 4,900 psi @ 72° F | -20° to 395° | ASTM A179 | 5929K223 | 00000 |
| 5/16" | 0.035" | Zinc-Plated Steel | 3,800 psi @ 72° F | -20° to 395° | ASTM A179 | 5929K224 | 00000 |
| 3/8" | 0.035" | Zinc-Plated Steel | 3,100 psi @ 72° F | -20° to 395° | ASTM A179 | 5929K225 | 00000 |
| 1/2" | 0.035" | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 395° | ASTM A179 | 5929K226 | 00000 |
| 5/8" | 0.035" | Zinc-Plated Steel | 1,800 psi @ 72° F | -20° to 395° | ASTM A179 | 5929K227 | 00000 |
| 3/4" | 0.049" | Zinc-Plated Steel | 2,100 psi @ 72° F | -20° to 395° | ASTM A179 | 5929K228 | 00000 |
| 1" | 0.065" | Zinc-Plated Steel | 2,100 psi @ 72° F | -20° to 395° | ASTM A179 | 5929K229 | 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 | 5929K261 | 00000 |
| 3/16" | 0.035" | Zinc-Plated Steel | 6,700 psi @ 72° F | -20° to 395° | ASTM A108 | 5929K262 | 0000 |
| 1/4" | 0.035" | Zinc-Plated Steel | 4,900 psi @ 72° F | -20° to 395° | ASTM A108 | 5929K263 | 0000 |
| 5/16" | 0.035" | Zinc-Plated Steel | 3,800 psi @ 72° F | -20° to 395° | ASTM A108 | 5929K264 | 0000 |
| 3/8" | 0.035" | Zinc-Plated Steel | 3,100 psi @ 72° F | -20° to 395° | ASTM A108 | 5929K265 | 0000 |
| 1/2" | 0.035" | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 395° | ASTM A108 | 5929K266 | 0000 |
| 5/8" | 0.035" | Zinc-Plated Steel | 1,800 psi @ 72° F | -20° to 395° | ASTM A108 | 5929K267 | 0000 |
| 3/4" | 0.049" | Zinc-Plated Steel | 2,200 psi @ 72° F | -20° to 395° | ASTM A108 | 5929K268 | 0000 |
| 1" | 0.065" | Zinc-Plated Steel | 2,100 psi @ 72° F | -20° to 395° | ASTM A108 | 5929K269 | 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 | 5929K302 | 00000 |
| 3/16" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 6,700 psi @ 72° F | -20° to 800° | ASME B31.3 | 5929K303 | 0000 |
| 1/4" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 4,850 psi @ 72° F | -20° to 800° | ASME B31.3 | 5929K304 | 0000 |
| 5/16" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 3,800 psi @ 72° F | -20° to 800° | ASME B31.3 | 5929K305 | 0000 |
| 3/8" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 3,100 psi @ 72° F | -20° to 800° | ASME B31.3 | 5929K306 | 0000 |
| 1/2" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 2,300 psi @ 72° F | -20° to 800° | ASME B31.3 | 5929K307 | 00000 |
| 5/8" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 1,800 psi @ 72° F | -20° to 800° | ASME B31.3 | 5929K308 | 00000 |
| 3/4" | 0.049" | Zinc-Plated Steel | 316 Stainless Steel | 2,150 psi @ 72° F | -20° to 800° | ASME B31.3 | 5929K309 | 00000 |
| 1" | 0.065" | Zinc-Plated Steel | 316 Stainless Steel | 2,100 psi @ 72° F | -20° to 800° | ASME B31.3 | 5929K311 | 00000 |

























