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Front and Back Sleeves for 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
- Compatible With: Let-Lok, Parker A-Lok, Swagelok®
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.
Sleeves with a dispenser come with 10 sets of front and back sleeves. Rather than stacking sleeves in your hand, the dispenser stages them for quick alignment with your Yor-Lok fitting. Insert the dispenser into the fitting, then slide the sleeves into place.
For technical drawings and 3-D models, click on a part number.
For Tube | Front Sleeve | Back Sleeve | |||||||
---|---|---|---|---|---|---|---|---|---|
OD | Wall Thick. | Sleeve Material | Lg. | No. Included | Lg. | No. Included | Max. Pressure | Each | |
Sleeves | |||||||||
1/16" | 0.02" | 316 Stainless Steel | 3/32" | 1 | 1/16" | 1 | 9,000 psi @ 72° F | 00000000 | 00000 |
1/8" | 0.035" | 316 Stainless Steel | 3/16" | 1 | 3/32" | 1 | 6,000 psi @ 72° F | 00000000 | 0000 |
3/16" | 0.035" | 316 Stainless Steel | 3/16" | 1 | 3/32" | 1 | 5,500 psi @ 72° F | 00000000 | 0000 |
1/4" | 0.035" | 316 Stainless Steel | 3/16" | 1 | 3/32" | 1 | 4,000 psi @ 72° F | 00000000 | 0000 |
5/16" | 0.035" | 316 Stainless Steel | 3/16" | 1 | 3/32" | 1 | 3,000 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 |
5/8" | 0.049" | 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 |
7/8" | 0.049" | 316 Stainless Steel | 9/32" | 1 | 5/32" | 1 | 1,600 psi @ 72° F | 00000000 | 00000 |
1" | 0.065" | 316 Stainless Steel | 3/8" | 1 | 13/64" | 1 | 1,500 psi @ 72° F | 00000000 | 00000 |
1 1/4" | 0.083" | 316 Stainless Steel | 35/64" | 1 | 13/64" | 1 | 2,000 psi @ 72° F | 00000000 | 00000 |
1 1/2" | 0.095" | 316 Stainless Steel | 41/64" | 1 | 17/64" | 1 | 1,800 psi @ 72° F | 00000000 | 00000 |
2" | 0.109" | 316 Stainless Steel | 63/64" | 1 | 25/64" | 1 | 1,600 psi @ 72° F | 00000000 | 000000 |
3mm | 0.5mm | 316 Stainless Steel | 5mm | 1 | 3mm | 1 | 4,000 psi @ 72° F | 00000000 | 0000 |
4mm | 1mm | 316 Stainless Steel | 5mm | 1 | 3mm | 1 | 3,500 psi @ 72° F | 00000000 | 0000 |
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 |
14mm | 1.5mm | 316 Stainless Steel | 7mm | 1 | 4mm | 1 | 2,000 psi @ 72° F | 00000000 | 00000 |
15mm | 1 to 2 mm | 316 Stainless Steel | 7mm | 1 | 4mm | 1 | 2,100 psi @ 72° F | 00000000 | 0000 |
16mm | 2mm | 316 Stainless Steel | 7.3mm | 1 | 3.8mm | 1 | 2,000 psi @ 72° F | 00000000 | 0000 |
18mm | 1.5 to 2.5 mm | 316 Stainless Steel | 7mm | 1 | 4mm | 1 | 2,900 psi @ 72° F | 00000000 | 00000 |
20mm | 1.5 to 2.5 mm | 316 Stainless Steel | 7mm | 1 | 4mm | 1 | 2,600 psi @ 72° F | 0000000 | 00000 |
22mm | 1.5 to 2.5 mm | 316 Stainless Steel | 7.3mm | 1 | 3.8mm | 1 | 2,000 psi @ 72° F | 00000000 | 00000 |
25mm | 2 to 3 mm | 316 Stainless Steel | 10mm | 1 | 5mm | 1 | 2,900 psi @ 72° F | 00000000 | 00000 |
Sleeves with Dispenser | |||||||||
1/8" | 0.035" | 316 Stainless Steel | 3/16" | 10 | 3/32" | 10 | 6,000 psi @ 72° F | 00000000 | 00000 |
3/16" | 0.035" | 316 Stainless Steel | 3/16" | 10 | 3/32" | 10 | 5,500 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 |
5/16" | 0.035" | 316 Stainless Steel | 3/16" | 10 | 7/64" | 10 | 3,000 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 |
5/8" | 0.049" | 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 |
7/8" | 0.049" | 316 Stainless Steel | 9/32" | 10 | 5/32" | 10 | 1,600 psi @ 72° F | 00000000 | 000000 |
1" | 0.065" | 316 Stainless Steel | 3/8" | 10 | 13/64" | 10 | 1,500 psi @ 72° F | 00000000 | 000000 |
PTFE Sleeves for Yor-Lok Fittings

- For Use With: Air, Cutting Oil, Fuel Oil, Gasoline, Hydraulic Fluid, Mineral Oil, Water
- Temperature Range: -65° to 350° F
- Tubing: Use with firm or hard acetal plastic, EVA plastic, HDPE plastic, nylon plastic, PEEK plastic, polycarbonate plastic, polyethylene plastic, polypropylene plastic, PTFE plastic, PVC plastic, PVDF plastic, or THV plastic
- Compatible With: Let-Lok, Parker A-Lok, Swagelok®
Made of plastic, these sleeves create a strong seal without damaging tubing.
For technical drawings and 3-D models, click on a part number.
For Tube OD | Sleeve Material | Each | |
1/16" | PTFE Plastic | 00000000 | 000000 |
1/8" | PTFE Plastic | 00000000 | 0000 |
3/16" | PTFE Plastic | 00000000 | 00000 |
1/4" | PTFE Plastic | 00000000 | 0000 |
5/16" | PTFE Plastic | 00000000 | 0000 |
3/8" | PTFE Plastic | 00000000 | 0000 |
1/2" | PTFE Plastic | 00000000 | 0000 |
5/8" | PTFE Plastic | 00000000 | 00000 |
3/4" | PTFE Plastic | 00000000 | 00000 |
7/8" | PTFE Plastic | 00000000 | 00000 |
1" | PTFE Plastic | 00000000 | 00000 |
1 1/2" | PTFE Plastic | 00000000 | 00000 |
Sleeve and Nut Sets for 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
- Compatible With: Let-Lok, Parker A-Lok, Swagelok®
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 |
3/16" | 0.035" | 316 Stainless Steel | 3/16" | 5 | 3/32" | 5 | 15/32" | 5 | 5,500 psi @ 72° F | 0000000 | 00000 |
1/4" | 0.035" | 316 Stainless Steel | 3/16" | 5 | 7/64" | 5 | 1/2" | 5 | 4,000 psi @ 72° F | 0000000 | 00000 |
5/16" | 0.035" | 316 Stainless Steel | 3/16" | 5 | 7/64" | 5 | 17/32" | 5 | 3,000 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 |
5/8" | 0.049" | 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 |
7/8" | 0.049" | 316 Stainless Steel | 9/32" | 5 | 5/32" | 5 | 11/16" | 5 | 1,600 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 |
3mm | 0.8mm | 316 Stainless Steel | 5mm | 5 | 3mm | 5 | 12mm | 5 | 4,000 psi @ 72° F | 0000000 | 00000 |
4mm | 1mm | 316 Stainless Steel | 5mm | 5 | 3mm | 5 | 12mm | 5 | 3,500 psi @ 72° F | 0000000 | 00000 |
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 | 00000 |
Front and Back Sleeves for Extreme-Pressure
Yor-Lok Fittings for Stainless Steel Tubing


- For Use With: Air, Cutting Oil, Fuel Oil, Hydraulic Fluid, Mineral Oil, Natural Gas, Water
- Temperature Range: -420° to 1,000° F
- Tubing: Use with seamless 316/316L stainless steel
- Specifications Met: ASME B31.3
Use these sleeves with extreme-pressure 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 technical drawings and 3-D models, click on a part number.
Front and Back Sleeves for 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
- Compatible With: Let-Lok, Parker A-Lok, Swagelok®
Use these sleeves with Yor-Lok nuts and fittings to create an extra-strong seal on copper tubing. Sleeves are brass for good corrosion resistance. They are also known as ferrules.
Sleeves with a dispenser are easier to install than individual sleeves, and less likely to get lost. Front and back sleeves are paired together—slide them off the dispenser and directly onto a tube.

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 |
3/16" | Brass | 3/16" | 1 | 3/32" | 1 | 2,300 psi @ 72° F | 00000000 | 0000 |
1/4" | Brass | 3/16" | 1 | 3/32" | 1 | 1,600 psi @ 72° F | 00000000 | 0000 |
5/16" | Brass | 3/16" | 1 | 3/32" | 1 | 1,300 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 |
5/8" | Brass | 19/64" | 1 | 5/32" | 1 | 900 psi @ 72° F | 00000000 | 00000 |
3/4" | Brass | 19/64" | 1 | 5/32" | 1 | 700 psi @ 72° F | 00000000 | 0000 |
7/8" | Brass | 9/32" | 1 | 5/32" | 1 | 1,100 psi @ 72° F | 00000000 | 0000 |
1" | Brass | 3/8" | 1 | 13/16" | 1 | 800 psi @ 72° F | 00000000 | 00000 |
6mm | Brass | 5mm | 1 | 3mm | 1 | 2,030 psi @ 72° F | 00000000 | 0000 |
8mm | Brass | 5mm | 1 | 3mm | 1 | 1,450 psi @ 72° F | 00000000 | 0000 |
10mm | Brass | 5mm | 1 | 3mm | 1 | 1,160 psi @ 72° F | 00000000 | 0000 |
12mm | Brass | 7mm | 1 | 4mm | 1 | 870 psi @ 72° F | 00000000 | 0000 |

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 |
3/16" | Brass | 3/16" | 10 | 7/64" | 10 | 1,800 psi @ 72° F | 00000000 | 00000 |
1/4" | Brass | 3/16" | 10 | 7/64" | 10 | 1,300 psi @ 72° F | 00000000 | 00000 |
5/16" | 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 | 3/16" | 10 | 7/64" | 10 | 1,200 psi @ 72° F | 00000000 | 00000 |
5/8" | Brass | 3/16" | 10 | 7/64" | 10 | 1,250 psi @ 72° F | 00000000 | 00000 |
3/4" | Brass | 9/32" | 10 | 5/32" | 10 | 1,000 psi @ 72° F | 00000000 | 00000 |
7/8" | Brass | 9/32" | 10 | 5/32" | 10 | 1,100 psi @ 72° F | 00000000 | 00000 |
1" | Brass | 9/32" | 10 | 5/32" | 10 | 1,000 psi @ 72° F | 00000000 | 000000 |
Front and Back Sleeves for Yor-Lok Fittings for Steel Tubing

- For Use With: Air, Mineral Oil, Fuel Oil, Gasoline, Diesel Fuel, Cutting Oil, Hydraulic Fluid
- Temperature Range: -20° to 800° F
- Tubing: Use with seamless steel
- Specifications Met: ASME B31.3
- Compatible With: Let-Lok, Parker A-Lok, Swagelok®
Use these sleeves with Yor-Lok nuts and fittings to create an extra-strong seal on steel tubing. They are also known as ferrules.
Zinc-plated steel sleeves have fair corrosion resistance. 316 stainless steel sleeves have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
For Tube | ||||||
---|---|---|---|---|---|---|
OD | Wall Thick. | Front Sleeve Material | Back Sleeve Material | Max. Pressure | Each | |
1/8" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 6,800 psi @ 72° F | 00000000 | 00000 |
3/16" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 6,700 psi @ 72° F | 00000000 | 0000 |
1/4" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 4,850 psi @ 72° F | 00000000 | 0000 |
5/16" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 3,800 psi @ 72° F | 00000000 | 00000 |
3/8" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 3,100 psi @ 72° F | 00000000 | 00000 |
1/2" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 2,300 psi @ 72° F | 00000000 | 00000 |
5/8" | 0.035" | Zinc-Plated Steel | 316 Stainless Steel | 1,800 psi @ 72° F | 00000000 | 00000 |
3/4" | 0.049" | Zinc-Plated Steel | 316 Stainless Steel | 2,150 psi @ 72° F | 00000000 | 00000 |
1" | 0.065" | Zinc-Plated Steel | 316 Stainless Steel | 2,100 psi @ 72° F | 00000000 | 00000 |
2mm | 0.3mm | Zinc-Plated Steel | 316 Stainless Steel | 3,000 psi @ 72° F | 00000000 | 0000 |
3mm | 0.8mm | Zinc-Plated Steel | 316 Stainless Steel | 10,000 psi @ 72° F | 00000000 | 0000 |
4mm | 0.8mm | Zinc-Plated Steel | 316 Stainless Steel | 7,200 psi @ 72° F | 00000000 | 0000 |
6mm | 0.8mm | Zinc-Plated Steel | 316 Stainless Steel | 4,400 psi @ 72° F | 00000000 | 0000 |
8mm | 1mm | Zinc-Plated Steel | 316 Stainless Steel | 4,200 psi @ 72° F | 00000000 | 0000 |
10mm | 1mm | Zinc-Plated Steel | 316 Stainless Steel | 3,300 psi @ 72° F | 00000000 | 0000 |
12mm | 1mm | Zinc-Plated Steel | 316 Stainless Steel | 2,700 psi @ 72° F | 00000000 | 0000 |
15mm | 1.5mm | Zinc-Plated Steel | 316 Stainless Steel | 3,300 psi @ 72° F | 00000000 | 0000 |
16mm | 1.5mm | Zinc-Plated Steel | 316 Stainless Steel | 3,000 psi @ 72° F | 00000000 | 0000 |
18mm | 1.5mm | Zinc-Plated Steel | 316 Stainless Steel | 2,700 psi @ 72° F | 00000000 | 0000 |
Front and Back Sleeves for Acid-Resistant
Yor-Lok Fittings for Nickel Alloy Tubing

- For Use With: Air, Cutting Oil, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydrofluoric Acid, Mineral Oil, Salt Water, Steam, Sulfuric Acid, Water
- Temperature Range: -325° to 900° F
- Tubing: Use with seamless soft 400 Nickel
- Specifications Met: ASTM B164
- Compatible With: Let-Lok, Parker A-Lok, Swagelok®
Use these 400 nickel Monel sleeves with Yor-Lok nuts and fittings to create a strong, leak-resistant seal. They have the corrosion resistance to handle hydrofluoric and sulfuric acid. They are also known as ferrules.
For technical drawings and 3-D models, click on a part number.
Front and Back Sleeves for Ultra-Corrosion-Resistant
Yor-Lok Fittings for Nickel Alloy Tubing

- For Use With: Acetic Acid, Air, Bleach, Cutting Oil, Diesel Fuel, Formic Acid, Fuel Oil, Gasoline, Hydraulic Fluid, Iron Chlorides, Mineral Oil, Salt Water, Steam, Water
- Temperature Range: 0° to 1,000° F
- Tubing: Use with seamless soft C276 nickel
- Specifications Met: ASME B31.3
- Compatible With: Let-Lok, Parker A-Lok, Swagelok®
Use these C276 nickel Hastelloy sleeves with Yor-Lok nuts and fittings to create a strong, leak-resistant seal. With the best corrosion resistance of any Yor-Lok sleeves we offer, they stand up to aggressive chemicals and resist pitting and cracking from stress. They are also known as ferrules.
For technical drawings and 3-D models, click on a part number.