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
Yor-Lok Fittings for Stainless Steel Tubing

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. They are compatible with Swagelok®, Let-Lok, and A-Lok fittings.
316 stainless steel fittings have excellent corrosion resistance.

- For Use With: Air, Cutting Oil, Fuel Oil, Gasoline, Hydraulic Fluid, Mineral Oil, Natural Gas, Steam, Water
- Tubing: Use with welded or seamless 304/304L or 316/316L stainless steel that meets ASTM A213, ASTM A249, or ASTM A269
Fittings with tube stem insert into the tube end of another fitting in place of a length of tubing.
Fittings with sleeve end allow you to connect two fittings closely together by replacing the sleeves in one fitting.
For Tube | |||||||
|---|---|---|---|---|---|---|---|
| Tube Stem OD | OD | Wall Thick. | Material | Max. Pressure | Temp. Range, °F | Each | |
| 1/16" | 1/16" | 0.02" | 316 Stainless Steel | 9,000 psi @ 72° F | -420° to 1200° | 00000000 | 000000 |
| 1/16" | 1/4" | 0.035" | 316 Stainless Steel | 4,000 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 1/8" | 1/8" | 0.035" | 316 Stainless Steel | 6,000 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 1/8" | 1/4" | 0.035" | 316 Stainless Steel | 4,000 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 1/8" | 3/8" | 0.035" | 316 Stainless Steel | 2,500 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 1/4" | 1/4" | 0.035" | 316 Stainless Steel | 4,000 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 1/4" | 3/8" | 0.035" | 316 Stainless Steel | 2,500 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 1/4" | 1/2" | 0.035" | 316 Stainless Steel | 2,000 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 3/8" | 3/8" | 0.035" | 316 Stainless Steel | 2,500 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 3/8" | 1/2" | 0.035" | 316 Stainless Steel | 2,000 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 1/2" | 1/2" | 0.035" | 316 Stainless Steel | 2,000 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 1/2" | 3/4" | 0.049" | 316 Stainless Steel | 2,000 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 3/4" | 3/4" | 0.049" | 316 Stainless Steel | 2,000 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 1" | 1" | 0.065" | 316 Stainless Steel | 1,500 psi @ 72° F | -420° to 1200° | 0000000 | 00000 |
| 6mm | 6mm | 1 to 1.5 mm | 316 Stainless Steel | 6,000 psi @ 72° F | -420° to 1200° | 00000000 | 0000 |
| 8mm | 8mm | 1 to 1.5 mm | 316 Stainless Steel | 4,400 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 10mm | 10mm | 1 to 1.5 mm | 316 Stainless Steel | 3,400 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 12mm | 12mm | 1 to 2 mm | 316 Stainless Steel | 2,900 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |

Use these nuts with Yor-Lok sleeves and fittings to create an extra-strong seal on stainless steel tubing. They are 316 stainless steel for excellent corrosion resistance.
For Tube | ||||||
|---|---|---|---|---|---|---|
| OD | Wall Thick. | Nut Material | Max. Pressure | Temp. Range, °F | Each | |
| 1/16" | 0.02" | 316 Stainless Steel | 9,000 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 1/8" | 0.035" | 316 Stainless Steel | 6,000 psi @ 72° F | -420° to 1200° | 00000000 | 0000 |
| 1/4" | 0.035" | 316 Stainless Steel | 4,000 psi @ 72° F | -420° to 1200° | 00000000 | 0000 |
| 3/8" | 0.035" | 316 Stainless Steel | 2,500 psi @ 72° F | -420° to 1200° | 00000000 | 0000 |
| 1/2" | 0.035" | 316 Stainless Steel | 2,000 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 3/4" | 0.049" | 316 Stainless Steel | 2,000 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 1" | 0.065" | 316 Stainless Steel | 1,500 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 6mm | 1mm | 316 Stainless Steel | 4,000 psi @ 72° F | -420° to 1200° | 00000000 | 0000 |
| 8mm | 1mm | 316 Stainless Steel | 3,000 psi @ 72° F | -420° to 1200° | 00000000 | 0000 |
| 10mm | 0.5mm | 316 Stainless Steel | 2,500 psi @ 72° F | -420° to 1200° | 00000000 | 0000 |
| 12mm | 0.5mm | 316 Stainless Steel | 2,000 psi @ 72° F | -420° to 1200° | 00000000 | 0000 |


Couple these sleeves with Yor-Lok nuts and fittings to create an extra-strong seal on stainless steel tubing. Sleeves are 316 stainless steel for excellent corrosion resistance. They are also known as ferrules.
For Tube | Front Sleeve | Back Sleeve | |||||||
|---|---|---|---|---|---|---|---|---|---|
| OD | Wall Thick. | Sleeve Material | Lg. | No. Included | Lg. | No. Included | Max. Pressure | Each | |
Sleeves | |||||||||
| 1/8" | 0.035" | 316 Stainless Steel | 3/16" | 1 | 3/32" | 1 | 6,000 psi @ 72° F | 00000000 | 00000 |
| 1/4" | 0.035" | 316 Stainless Steel | 3/16" | 1 | 3/32" | 1 | 4,000 psi @ 72° F | 00000000 | 0000 |
| 3/8" | 0.035" | 316 Stainless Steel | 3/16" | 1 | 3/32" | 1 | 2,500 psi @ 72° F | 00000000 | 0000 |
| 1/2" | 0.035" | 316 Stainless Steel | 19/64" | 1 | 5/32" | 1 | 2,000 psi @ 72° F | 00000000 | 0000 |
| 3/4" | 0.049" | 316 Stainless Steel | 19/64" | 1 | 5/32" | 1 | 2,000 psi @ 72° F | 00000000 | 0000 |
| 1" | 0.065" | 316 Stainless Steel | 3/8" | 1 | 13/64" | 1 | 1,500 psi @ 72° F | 00000000 | 00000 |
| 6mm | 1mm | 316 Stainless Steel | 5mm | 1 | 3mm | 1 | 4,000 psi @ 72° F | 00000000 | 0000 |
| 8mm | 1mm | 316 Stainless Steel | 5mm | 1 | 3mm | 1 | 3,000 psi @ 72° F | 00000000 | 0000 |
| 10mm | 0.5mm | 316 Stainless Steel | 5mm | 1 | 3mm | 1 | 2,500 psi @ 72° F | 00000000 | 0000 |
| 12mm | 0.5mm | 316 Stainless Steel | 7mm | 1 | 4mm | 1 | 2,000 psi @ 72° F | 00000000 | 0000 |
Sleeves with Dispenser | |||||||||
| 1/8" | 0.035" | 316 Stainless Steel | 3/16" | 10 | 3/32" | 10 | 6,000 psi @ 72° F | 00000000 | 00000 |
| 1/4" | 0.035" | 316 Stainless Steel | 3/16" | 10 | 7/64" | 10 | 4,000 psi @ 72° F | 00000000 | 00000 |
| 3/8" | 0.035" | 316 Stainless Steel | 3/16" | 10 | 7/64" | 10 | 2,500 psi @ 72° F | 00000000 | 00000 |
| 1/2" | 0.035" | 316 Stainless Steel | 9/32" | 10 | 5/32" | 10 | 2,000 psi @ 72° F | 00000000 | 00000 |
| 3/4" | 0.049" | 316 Stainless Steel | 9/32" | 10 | 5/32" | 10 | 1,900 psi @ 72° F | 00000000 | 00000 |
| 1" | 0.065" | 316 Stainless Steel | 3/8" | 10 | 13/64" | 10 | 1,500 psi @ 72° F | 00000000 | 000000 |

Save time installing sleeves and nuts—these sets come oriented in the correct direction and order on a dispenser. To install them, slide off a set and place it on your tubing. Each front sleeve, back sleeve, and nut is made of 316 stainless steel for excellent corrosion resistance. Five sets of sleeves and nuts come on each dispenser. Sleeves are also known as ferrules.
For Tube | Front Sleeve | Back Sleeve | Nut | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| OD | Wall Thick. | Material | Lg. | No. Included | Lg. | No. Included | Lg. | No. Included | Max. Pressure | Each | |
Sets with Dispenser | |||||||||||
| 1/8" | 0.035" | 316 Stainless Steel | 3/16" | 5 | 3/32" | 5 | 15/32" | 5 | 6,000 psi @ 72° F | 0000000 | 000000 |
| 1/4" | 0.035" | 316 Stainless Steel | 3/16" | 5 | 7/64" | 5 | 1/2" | 5 | 4,000 psi @ 72° F | 0000000 | 00000 |
| 3/8" | 0.035" | 316 Stainless Steel | 3/16" | 5 | 7/64" | 5 | 9/16" | 5 | 2,500 psi @ 72° F | 0000000 | 00000 |
| 1/2" | 0.035" | 316 Stainless Steel | 9/32" | 5 | 5/32" | 5 | 11/16" | 5 | 2,000 psi @ 72° F | 0000000 | 00000 |
| 3/4" | 0.049" | 316 Stainless Steel | 9/32" | 5 | 5/32" | 5 | 11/16" | 5 | 1,900 psi @ 72° F | 0000000 | 000000 |
| 1" | 0.065" | 316 Stainless Steel | 3/8" | 5 | 13/64" | 5 | 13/16" | 5 | 1,500 psi @ 72° F | 0000000 | 000000 |
| 6mm | 1mm | 316 Stainless Steel | 5mm | 5 | 3mm | 5 | 13mm | 5 | 4,000 psi @ 72° F | 0000000 | 00000 |
| 8mm | 1mm | 316 Stainless Steel | 5mm | 5 | 3mm | 5 | 14mm | 5 | 3,000 psi @ 72° F | 0000000 | 00000 |
| 10mm | 1mm | 316 Stainless Steel | 5mm | 5 | 3mm | 5 | 15mm | 5 | 2,500 psi @ 72° F | 0000000 | 00000 |
| 12mm | 1mm | 316 Stainless Steel | 7mm | 5 | 4mm | 5 | 17mm | 5 | 2,000 psi @ 72° F | 0000000 | 000000 |

PTFE sleeves are plastic instead of stainless steel, so they won’t damage tubing.
| For Tube OD | Sleeve Material | Max. Pressure | Temp. Range, °F | Each | |
| 1/16" | PTFE Plastic | Not Rated | -65° to 350° | 00000000 | 000000 |
| 1/8" | PTFE Plastic | Not Rated | -65° to 350° | 00000000 | 0000 |
| 1/4" | PTFE Plastic | Not Rated | -65° to 350° | 00000000 | 0000 |
| 3/8" | PTFE Plastic | Not Rated | -65° to 350° | 00000000 | 0000 |
| 1/2" | PTFE Plastic | Not Rated | -65° to 350° | 00000000 | 0000 |
| 3/4" | PTFE Plastic | Not Rated | -65° to 350° | 00000000 | 00000 |
| 1" | PTFE Plastic | Not Rated | -65° to 350° | 00000000 | 00000 |


Tube supports are recommended for soft plastic tubing to prevent the tube from collapsing.
For Tube | ||||||
|---|---|---|---|---|---|---|
| OD | ID | Tube Support Material | Tube Support Style | Temp. Range, °F | Each | |
| 1/4" | 1/8" | 316 Stainless Steel | Smooth | -420° to 1200° | 00000000 | 00000 |
| 5/16" | 1/8" | 316 Stainless Steel | Barbed | -420° to 1200° | 00000000 | 0000 |
| 3/8" | 0.188" | 316 Stainless Steel | Smooth | -420° to 1200° | 00000000 | 0000 |
| 3/8" | 1/4" | 316 Stainless Steel | Smooth | -420° to 1200° | 00000000 | 0000 |
| 1/2" | 1/4" | 316 Stainless Steel | Smooth | -420° to 1200° | 00000000 | 00000 |
| 1/2" | 3/8" | 316 Stainless Steel | Smooth | -420° to 1200° | 00000000 | 0000 |
| 3/4" | 1/2" | 316 Stainless Steel | Smooth | -420° to 1200° | 00000000 | 00000 |
| 3/4" | 5/8" | 316 Stainless Steel | Barbed | -420° to 1200° | 00000000 | 00000 |
| 1" | 3/4" | 316 Stainless Steel | Smooth | -420° to 1200° | 00000000 | 00000 |
| 6mm | 4mm | 316 Stainless Steel | Barbed | -420° to 1200° | 00000000 | 0000 |
| 8mm | 6mm | 316 Stainless Steel | Barbed | -420° to 1200° | 00000000 | 0000 |
| 10mm | 8mm | 316 Stainless Steel | Barbed | -420° to 1200° | 00000000 | 0000 |
| 12mm | 8mm | 316 Stainless Steel | Barbed | -420° to 1200° | 00000000 | 00000 |
| 12mm | 10mm | 316 Stainless Steel | Barbed | -420° to 1200° | 00000000 | 00000 |
Cleaned and Bagged Yor-Lok Fittings for Stainless Steel Tubing

- For Use With: Air, Cutting Oil, Fuel Oil, Gasoline, Hydraulic Fluid, Mineral Oil, Natural Gas, Steam, Water
- Temperature Range: -420° to 1200° F
- Tubing: Use with seamless or welded 304/304L or 316/316L stainless steel that meets ASTM A213, ASTM A249, or ASTM A269
For applications that require an extra level of cleanliness, these fittings are individually bagged to prevent contamination. They include a nut with two sleeves (ferrules) for 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. They are compatible with Swagelok®, Let-Lok, or A-Lok fittings. Fittings are 316 stainless steel for excellent corrosion resistance. Replacement nuts and sleeves are not cleaned and bagged.

Fittings with tube stem insert into the tube end of another fitting in place of a length of tubing.
For Tube | ||||||
|---|---|---|---|---|---|---|
| Tube Stem OD | OD | Wall Thick. | Material | Max. Pressure | Each | |
| 1/8" | 1/8" | 0.035" | 316 Stainless Steel | 6,000 psi @ 72° F | 00000000 | 000000 |
| 1/4" | 1/4" | 0.035" | 316 Stainless Steel | 4,000 psi @ 72° F | 00000000 | 00000 |
| 3/8" | 3/8" | 0.035" | 316 Stainless Steel | 2,500 psi @ 72° F | 00000000 | 00000 |
| 1/2" | 1/2" | 0.035" | 316 Stainless Steel | 2,000 psi @ 72° F | 00000000 | 00000 |
Yor-Lok Fittings for Copper Tubing

- For Use With: Air, Cutting Oil, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Mineral Oil, Water
- Temperature Range: -40° to 400° F
- Tubing: Use with seamless copper
- Specifications Met: ASME B31.3
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 brass for good corrosion resistance. They are compatible with Swagelok®, Let-Lok, and A-Lok fittings.

Fittings with tube stem insert into the tube end of another fitting in place of a length of tubing.
Fittings with sleeve end allow you to connect two fittings closely together by replacing the sleeves in one fitting.
For Tube | ||||||
|---|---|---|---|---|---|---|
| Tube Stem OD | OD | Wall Thick. | Material | Max. Pressure | Each | |
| 1/8" | 1/8" | 0.028" | Brass | 2,800 psi @ 72° F | 00000000 | 000000 |
| 1/4" | 1/4" | 0.028" | Brass | 1,300 psi @ 72° F | 00000000 | 0000 |
| 1/4" | 3/8" | 0.035" | Brass | 1,100 psi @ 72° F | 00000000 | 00000 |
| 3/8" | 3/8" | 0.035" | Brass | 1,100 psi @ 72° F | 00000000 | 00000 |
| 1/2" | 1/2" | 0.049" | Brass | 1,200 psi @ 72° F | 00000000 | 00000 |

Save time installing sleeves—these sets come oriented in the correct direction and order on a dispenser. To install them, slide off a set and place it on your tubing. Each set includes a front and back sleeve. The sleeves are also known as ferrules.
Front Sleeve | Back Sleeve | |||||||
|---|---|---|---|---|---|---|---|---|
| For Tube OD | Sleeve Material | Lg. | No. Included | Lg. | No. Included | Max. Pressure | Each | |
| 1/8" | Brass | 3/16" | 10 | 7/64" | 10 | 2,800 psi @ 72° F | 00000000 | 000000 |
| 1/4" | Brass | 3/16" | 10 | 7/64" | 10 | 1,300 psi @ 72° F | 00000000 | 00000 |
| 3/8" | Brass | 3/16" | 10 | 7/64" | 10 | 1,100 psi @ 72° F | 00000000 | 00000 |
| 1/2" | Brass | 19/64" | 10 | 9/64" | 10 | 1,200 psi @ 72° F | 00000000 | 00000 |

Save time installing sleeves and nuts—these sets come oriented in the correct direction and order on a dispenser. To install them, slide off a set and place it on your tubing. Each set includes a front sleeve, a back sleeve, and a nut. The sleeves are also known as ferrules.
Front Sleeve | Back Sleeve | Nut | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | Material | Lg. | No. Included | Lg. | No. Included | Lg. | No. Included | Max. Pressure | Each | |
| 1/8" | Brass | 3/16" | 5 | 7/64" | 5 | 15/32" | 5 | 2,800 psi @ 72° F | 0000000 | 000000 |
| 1/4" | Brass | 3/16" | 5 | 7/64" | 5 | 1/2" | 5 | 1,300 psi @ 72° F | 0000000 | 00000 |
| 3/8" | Brass | 3/16" | 5 | 7/64" | 5 | 9/16" | 5 | 1,100 psi @ 72° F | 0000000 | 00000 |
| 1/2" | Brass | 3/16" | 5 | 7/64" | 5 | 11/16" | 5 | 1,200 psi @ 72° F | 0000000 | 00000 |


For Tube | Tube Support | |||||
|---|---|---|---|---|---|---|
| OD | ID | Style | Material | Max. Pressure | Each | |
| 1/4" | 1/8" | Smooth | Brass | 1,300 psi @ 72° F | 0000000 | 00000 |
| 1/4" | 0.17" | Smooth | Brass | 1,300 psi @ 72° F | 0000000 | 0000 |
| 1/4" | 0.188" | Smooth | Brass | 1,300 psi @ 72° F | 0000000 | 0000 |
| 5/16" | 1/8" | Barbed | Brass | 1,300 psi @ 72° F | 0000000 | 0000 |
| 3/8" | 3/16" | Barbed | Brass | 1,100 psi @ 72° F | 0000000 | 0000 |
| 3/8" | 1/4" | Barbed | Brass | 1,100 psi @ 72° F | 0000000 | 0000 |
| 1/2" | 1/4" | Barbed | Brass | 1,200 psi @ 72° F | 0000000 | 0000 |
| 1/2" | 3/8" | Smooth | Brass | 800 psi @ 72° F | 0000000 | 0000 |



























