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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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.
| Tube Stem OD | Pipe Size | Material | Max. Pressure | Each | |
NPT Threads | |||||
|---|---|---|---|---|---|
| 1/4" | 1/8 | Brass | 1,600 psi @ 72° F | 00000000 | 00000 |
| 1/4" | 1/4 | Brass | 1,600 psi @ 72° F | 00000000 | 0000 |
| 3/8" | 1/4 | Brass | 1,000 psi @ 72° F | 00000000 | 0000 |
| 3/8" | 3/8 | Brass | 1,000 psi @ 72° F | 00000000 | 0000 |
| 1/2" | 1/4 | Brass | 1,200 psi @ 72° F | 00000000 | 00000 |
| 1/2" | 3/8 | Brass | 800 psi @ 72° F | 00000000 | 00000 |
| 1/2" | 1/2 | Brass | 800 psi @ 72° F | 00000000 | 00000 |
| 3/4" | 3/4 | Brass | 1,000 psi @ 72° F | 00000000 | 00000 |
| 1" | 1 | Brass | 1,000 psi @ 72° F | 00000000 | 00000 |
Fittings with tube stem insert into the tube end of another fitting in place of a length of tubing.
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" | 1/16" | 0.01" | Brass | 1,650 psi @ 72° F | 00000000 | 000000 |
| 1/8" | 1/4" | 0.028" | Brass | 1,300 psi @ 72° F | 00000000 | 00000 |
| 1/4" | 1/8" | 0.028" | Brass | 1,300 psi @ 72° F | 00000000 | 00000 |
| 1/4" | 1/4" | 0.028" | Brass | 1,300 psi @ 72° F | 00000000 | 00000 |
| 1/4" | 3/8" | 0.035" | Brass | 1,100 psi @ 72° F | 00000000 | 00000 |
| 3/8" | 1/4" | 0.028" | Brass | 1,100 psi @ 72° F | 00000000 | 00000 |
| 3/8" | 1/2" | 0.049" | Brass | 1,100 psi @ 72° F | 00000000 | 00000 |
| 1/2" | 1/4" | 0.028" | Brass | 1,200 psi @ 72° F | 00000000 | 00000 |
| 1/2" | 3/8" | 0.035" | Brass | 1,100 psi @ 72° F | 00000000 | 00000 |
| 3/4" | 1/2" | 0.049" | Brass | 1,100 psi @ 72° F | 00000000 | 00000 |
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 |
Front Sleeve | Back Sleeve | |||||||
|---|---|---|---|---|---|---|---|---|
| For Tube OD | Sleeve Material | Lg. | No. Included | Lg. | No. Included | Max. Pressure | Each | |
| 1/16" | Brass | 3/32" | 1 | 1/16" | 1 | 5,400 psi @ 72° F | 00000000 | 00000 |
| 1/8" | Brass | 3/16" | 1 | 3/32" | 1 | 2,900 psi @ 72° F | 00000000 | 0000 |
| 1/4" | Brass | 3/16" | 1 | 3/32" | 1 | 1,600 psi @ 72° F | 00000000 | 0000 |
| 3/8" | Brass | 3/16" | 1 | 3/32" | 1 | 1,000 psi @ 72° F | 00000000 | 0000 |
| 1/2" | Brass | 19/64" | 1 | 5/32" | 1 | 800 psi @ 72° F | 00000000 | 0000 |
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 |
| 5/16" | 1/4" | 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 |