Connection Style Connection Style |
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| Yor-Lok |
Material Material |
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For Pipe Material For Pipe Material |
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Shape Shape |
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 | Straight |
System of Measurement System of Measurement |
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For Use With For Use With |
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Length Length |
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Maximum Vacuum Maximum Vacuum |
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Maximum Pressure Maximum Pressure |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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For Tube Material For Tube Material |
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Gender Gender |
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Maximum Temperature Maximum Temperature |
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Compatible With Compatible With |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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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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Quick-Clamp High-Vacuum Fittings for Stainless Steel Tubing
- For Use With:
Fittings with Gasket End: Air, Argon, Helium, Nitrogen
All Other Fittings: Air - Temperature Range: 0° to 300° F
- Tubing: Use with 304/304L or 316/316L stainless steel
- Specifications Met: ISO 2861
Instead of a gasket, these fittings have a special ring that is designed for high-vacuum applications, such as vacuum coating and heat treating, leak testing, and analyzing gases. Also known as KF, QF, and NW fittings, they are the most common type of connection in high-vacuum systems. Connect with a clamp and another quick-clamp fitting for fast, easy access to your line. To use fittings in pressure applications, use a pressure-rated ring (sold separately).
304 stainless steel fittings have very good corrosion resistance.
Note: To complete a connection, you’ll need two quick-clamp fittings, a ring, and a clamp (all sold separately).
For technical drawings and 3-D models, click on a part number.
Fittings with Yor-Lok end connect plain-end stainless steel tubing using a nut with two sleeves that bite into the tubing to create a strong seal. Yor-Lok connections are manufactured to tight tolerances—use them for high-pressure applications such as supplying gas or liquid to a high-vacuum chamber. Also known as instrumentation fittings.
Quick-Clamp Tube Connection | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | Flange OD | High-Vacuum Flange Size | High Vacuum Connection Type | For Tube OD (Yor-Lok) | Max. Vacuum | Max. Pressure | Compatible With | Each | |
| 3/4" | 1.18" | 16 | ISO-KF | 1/4" | 1 × 10 -9 torr @ 72° F | 5 psi @ 72° F | Let-Lok; Parker A-Lok; Swagelok® | 00000000 | 000000 |
| 3/4" | 1.18" | 16 | ISO-KF | 3/8" | 1 × 10 -9 torr @ 72° F | 5 psi @ 72° F | Let-Lok; Parker A-Lok; Swagelok® | 00000000 | 00000 |
| 3/4" | 1.18" | 16 | ISO-KF | 1/2" | 1 × 10 -9 torr @ 72° F | 5 psi @ 72° F | Let-Lok; Parker A-Lok; Swagelok® | 00000000 | 000000 |
| 1" | 1.57" | 25 | ISO-KF | 1/4" | 1 × 10 -9 torr @ 72° F | 5 psi @ 72° F | Let-Lok; Parker A-Lok; Swagelok® | 00000000 | 00000 |
| 1" | 1.57" | 25 | ISO-KF | 3/8" | 1 × 10 -9 torr @ 72° F | 5 psi @ 72° F | Let-Lok; Parker A-Lok; Swagelok® | 00000000 | 00000 |
| 1" | 1.57" | 25 | ISO-KF | 1/2" | 1 × 10 -9 torr @ 72° F | 5 psi @ 72° F | Let-Lok; Parker A-Lok; Swagelok® | 00000000 | 000000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 1/4" | 1 × 10 -9 torr @ 72° F | 5 psi @ 72° F | Let-Lok; Parker A-Lok; Swagelok® | 00000000 | 00000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 3/8" | 1 × 10 -9 torr @ 72° F | 5 psi @ 72° F | Let-Lok; Parker A-Lok; Swagelok® | 00000000 | 000000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 1/2" | 1 × 10 -9 torr @ 72° F | 5 psi @ 72° F | Let-Lok; Parker A-Lok; Swagelok® | 00000000 | 000000 |
Clamps tighten by hand. Spring-loaded clamps are also known as toggle clamps.
| For Tube OD | For Flange OD | For High-Vacuum Flange Size | High Vacuum Connection Type | Material | Max. Vacuum | Lanyard Length | Each | |
with Wing Nut | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/2", 3/4" | 1.18" | 10, 16 | ISO-KF | Aluminum | 1 × 10 -7 torr @ 72° F | __ | 00000000 | 00000 |
| 1" | 1.57" | 25 | ISO-KF | Aluminum | 1 × 10 -7 torr @ 72° F | __ | 0000000 | 00000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | Aluminum | 1 × 10 -7 torr @ 72° F | __ | 0000000 | 00000 |
Spring Loaded | ||||||||
| 1/2", 3/4" | 1.18" | 10, 16 | ISO-KF | Aluminum | 1 × 10 -7 torr @ 72° F | __ | 0000000 | 00000 |
| 1" | 1.57" | 25 | ISO-KF | Aluminum | 1 × 10 -7 torr @ 72° F | __ | 0000000 | 00000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | Aluminum | 1 × 10 -7 torr @ 72° F | __ | 0000000 | 00000 |
Spring Loaded with Lanyard | ||||||||
| 3/4" | 1.18" | 16 | ISO-KF | Aluminum | 1 × 10 -7 torr @ 72° F | 5 3/4" | 00000000 | 00000 |
| 1" | 1.57" | 25 | ISO-KF | Aluminum | 1 × 10 -7 torr @ 72° F | 5 3/4" | 00000000 | 00000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | Aluminum | 1 × 10 -7 torr @ 72° F | 5 3/4" | 00000000 | 00000 |
Use these rings with quick-clamp high-vacuum fittings. They consist of a stainless steel inner ring covered by a fluoroelastomer O-ring.
| For Tube OD | For Flange OD | For High-Vacuum Flange Size | High Vacuum Connection Type | Inner Ring Material | Max. Vacuum | Max. Pressure | Each | |
Rings | ||||||||
|---|---|---|---|---|---|---|---|---|
| 3/4" | 1.18" | 16 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | Not Rated | 00000000 | 00000 |
| 1" | 1.57" | 25 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | Not Rated | 0000000 | 00000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | Not Rated | 0000000 | 00000 |
Rings with Stainless Steel Screen | ||||||||
| 3/4" | 1.18" | 16 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | Not Rated | 00000000 | 00000 |
| 1" | 1.57" | 25 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | Not Rated | 00000000 | 00000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | Not Rated | 00000000 | 00000 |
Rings with Aluminum Outer Ring | ||||||||
| 3/4" | 1.18" | 16 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | Not Rated | 00000000 | 00000 |
| 1" | 1.57" | 25 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 100 psi @ 72° F | 0000000 | 00000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 75 psi @ 72° F | 0000000 | 00000 |
Hose absorbs moderate vibration
| For Tube OD | Flange OD | High-Vacuum Flange Size | High Vacuum Connection Type | Material | Max. Vacuum | Bend Radius | Flexibility | Each | |
3 3/16" Lg. | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 3/4" | 1.18" | 16 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | __ | Rigid | 0000000 | 000000 |
4 3/16" Lg. | |||||||||
| 1" | 1.57" | 25 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | __ | Rigid | 0000000 | 00000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | __ | Rigid | 0000000 | 000000 |
12" Lg. | |||||||||
| 3/4" | 1.18" | 16 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 1 5/8" | Flexible | 00000000 | 000000 |
| 1" | 1.57" | 25 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 1 3/8" | Flexible | 00000000 | 000000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 2 1/2" | Flexible | 00000000 | 000000 |
24" Lg. | |||||||||
| 3/4" | 1.18" | 16 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 1 5/8" | Flexible | 00000000 | 000000 |
| 1" | 1.57" | 25 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 1 3/8" | Flexible | 00000000 | 000000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 2 1/2" | Flexible | 00000000 | 000000 |
39" Lg. | |||||||||
| 3/4" | 1.18" | 16 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 1 5/8" | Flexible | 00000000 | 000000 |
| 1" | 1.57" | 25 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 1 3/8" | Flexible | 00000000 | 000000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 2 1/2" | Flexible | 00000000 | 000000 |
Through-Wall Fittings for High-Vacuum Chambers
- For Use With: See table
- Environment Temperature Range: 32° to 300° F
- Process Temperature Range: -325° to 995° F
- Tubing: Use with 304/304L or 316/316L stainless steel
- Specifications Met: See table
Transfer liquids and gasses into high-vacuum chambers with these assembled fittings, also known as feedthroughs. Because they form a tight seal on chamber walls, they are often used in coating, cooling, and leak-testing applications where negative pressure (vacuum) must be maintained. These fittings are ready to install and include high-vacuum fittings, metal tubing, and Yor-lok tube fittings. On each end, the Yor-lok fittings include a nut and two sleeves that grip your system’s stainless steel tubing. The entire assembly is stainless steel, so it resists rusting. These fittings are not for use in pressure applications.
Quick-clamp fittings meet ISO 2861, which specifies the dimensions of quick-clamp high-vacuum fittings, clamps, and rings to ensure vacuum tightness. These fittings require a clamp and ring (each sold separately) to complete the connection.
For technical drawings and 3-D models, click on a part number.
For Tube | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Flange OD | High-Vacuum Flange Size | OD | Wall Thick. | Lg. | Max. Vacuum | Material | Specifications Met | Each | |
For Use With Acetone, Air, Ammonium Hydroxide, Helium, Methane, Nitrogen, Oil, Water | |||||||||
| 1.18" | 16 | 1/4" | 0.028"-0.095" | 8" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | ISO 2861 | 0000000 | 0000000 |
| 1.57" | 25 | 1/4" | 0.028"-0.095" | 8" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | ISO 2861 | 0000000 | 000000 |
| 2.16" | 40 | 1/4" | 0.028"-0.095" | 8" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | ISO 2861 | 0000000 | 000000 |
| 2.95" | 50 | 1/4" | 0.028"-0.095" | 8" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | ISO 2861 | 0000000 | 000000 |
For Use With Liquid Helium, Liquid Methane, Liquid Nitrogen, Liquid Oxygen | |||||||||
| 1.18" | 16 | 1/4" | 0.028"-0.095" | 9" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | ISO 2861 | 0000000 | 000000 |
| 1.57" | 25 | 1/4" | 0.028"-0.095" | 9" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | ISO 2861 | 0000000 | 000000 |
| 2.16" | 40 | 1/4" | 0.028"-0.095" | 9" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | ISO 2861 | 0000000 | 000000 |
| 2.95" | 50 | 1/4" | 0.028"-0.095" | 9" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | ISO 2861 | 0000000 | 000000 |
Material | ||||||
|---|---|---|---|---|---|---|
| For Flange OD | For High-Vacuum Flange Size | O-Ring | Inner Ring | Max. Vacuum | Each | |
| 1.18" | 16 | Fluoroelastomer Rubber | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 00000000 | 00000 |
| 1.57" | 25 | Fluoroelastomer Rubber | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 0000000 | 00000 |
| 2.16" | 40 | Fluoroelastomer Rubber | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 0000000 | 00000 |
| 2.95" | 50 | Fluoroelastomer Rubber | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 0000000 | 00000 |
Medium-Pressure Clamp-On Connectors
Create quick, liquid-tight connections in medium-pressure applications with these connectors. They join rigid pipe of the same or different materials. Connectors have a gasket that permits moderate movement and misalignment of pipe ends.
Compression connectors slide onto pipe and hand tighten with the end nuts. You may need to tighten over time. These connectors have a Buna-N rubber gasket that resists oil, as well mild chemicals and water. Replace the gasket when it’s worn out, or swap it out for a gasket with different properties. Silicone rubber gaskets resist temperature changes better than Buna-N rubber gaskets, and also keep their flexibility. Viton® fluoroelastomer rubber gaskets resist extreme heat, as well as chemicals, fuel, and oil.
Black iron connectors have fair corrosion resistance. Galvanized iron connectors have good corrosion resistance. 304 stainless steel connectors have very good corrosion resistance. PVC connectors are lighter in weight and more economical than metal connectors.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Water
- Temperature Range: -60° to 260° F
- Specifications Met: ASME B36.19, ASTM A312
- For Pipe Material: Stainless Steel, Steel, Aluminum, CPVC Plastic
| For Pipe OD | For Pipe Size | Lg. | Pipe Connection Type | Max. Pressure | Gasket Material | Each | |
| 0.84" | 1/2 | 3 1/2" | Compression | 200 psi @ 72° F | Buna-N Rubber | 00000000 | 000000 |
| 1.05" | 3/4 | 3 1/2" | Compression | 200 psi @ 72° F | Buna-N Rubber | 00000000 | 000000 |
| 1.315" | 1 | 3 5/8" | Compression | 200 psi @ 72° F | Buna-N Rubber | 00000000 | 000000 |
| 1.66" | 1 1/4 | 3 5/8" | Compression | 200 psi @ 72° F | Buna-N Rubber | 00000000 | 000000 |
| 1.9" | 1 1/2 | 4" | Compression | 200 psi @ 72° F | Buna-N Rubber | 00000000 | 000000 |
| 2 3/8" | 2 | 4 5/16" | Compression | 200 psi @ 72° F | Buna-N Rubber | 00000000 | 000000 |
- For Use With: Air, Water
- Temperature Range: -60° to 260° F
- Specifications Met: ASME B36.10, ASTM A53
- For Pipe Material: Stainless Steel, Steel, Aluminum, CPVC Plastic
| For Pipe OD | For Pipe Size | Lg. | Pipe Connection Type | Max. Pressure | Gasket Material | Each | |
| 0.84" | 1/2 | 3 1/2" | Compression | 200 psi @ 72° F | Buna-N Rubber | 00000000 | 000000 |
| 1.05" | 3/4 | 3 1/2" | Compression | 200 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
| 1.315" | 1 | 3 5/8" | Compression | 200 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
| 1.66" | 1 1/4 | 3 5/8" | Compression | 200 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
| 1.9" | 1 1/2 | 4" | Compression | 200 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
| 2 3/8" | 2 | 4 5/16" | Compression | 200 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
- For Use With: Water
- Temperature Range: -20° to 180° F
- Specifications Met: ASTM A153, ASTM A197
- For Pipe Material: Steel, PVC Plastic
| For Pipe OD | For Pipe Size | Lg. | Pipe Connection Type | Max. Pressure | Gasket Material | Each | |
| 0.675" | 3/8 | 2 1/2" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
| 0.84" | 1/2 | 3" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
| 1.05" | 3/4 | 3 5/16" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
| 1.315" | 1 | 3 1/2" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
| 1.66" | 1 1/4 | 3 5/8" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
| 1.9" | 1 1/2 | 3 5/8" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
| 2 3/8" | 2 | 4 1/16" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
| 3 1/2" | 3 | 4 3/4" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
- For Use With: Water
- Temperature Range: -20° to 180° F
- Specifications Met: ASTM A197
- For Pipe Material: Steel, PVC Plastic
| For Pipe OD | For Pipe Size | Lg. | Pipe Connection Type | Max. Pressure | Gasket Material | Each | |
| 0.84" | 1/2 | 4 1/4" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 000000 |
| 1.05" | 3/4 | 4 7/16" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
| 1.315" | 1 | 4 3/4" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
| 1.66" | 1 1/4 | 4 3/4" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
| 1.9" | 1 1/2 | 5 3/16" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
| 2 3/8" | 2 | 5 3/8" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
- For Use With: Water
- Temperature Range: 32° to 73° F
- For Pipe Material: Steel, PVC Plastic
| For Pipe OD | For Pipe Size | Lg. | Pipe Connection Type | Max. Pressure | Gasket Material | Each | |
| 0.84" | 1/2 | 5" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
| 1.05" | 3/4 | 5.2" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 0000 |
| 1.315" | 1 | 6" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 0000 |
| 1.66" | 1 1/4 | 6.2" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 0000 |
| 1.9" | 1 1/2 | 6.7" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
| 2 3/8" | 2 | 7 1/2" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
| 3 1/2" | 3 | 10.6" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
| 4 1/2" | 4 | 13.1" | Compression | 125 psi @ 72° F | Buna-N Rubber | 00000000 | 00000 |
| For Pipe Size | Temperature Range, °F | Gasket Clarity | Gasket Color | Each | |
Buna-N Rubber | |||||
|---|---|---|---|---|---|
| 1/2 | -60° to 260° | Opaque | Black | 00000000 | 00000 |
| 3/4 | -60° to 260° | Opaque | Black | 00000000 | 0000 |
| 1 | -60° to 260° | Opaque | Black | 00000000 | 00000 |
| 1 1/4 | -60° to 260° | Opaque | Black | 00000000 | 00000 |
| 1 1/2 | -60° to 260° | Opaque | Black | 00000000 | 00000 |
| 2 | -60° to 260° | Opaque | Black | 00000000 | 00000 |
Silicone Rubber | |||||
| 1/2 | -180° to 400° | Opaque | Orange | 00000000 | 0000 |
| 3/4 | -180° to 400° | Opaque | Orange | 00000000 | 00000 |
| 1 | -180° to 400° | Opaque | Orange | 00000000 | 00000 |
| 1 1/4 | -180° to 400° | Opaque | Orange | 00000000 | 00000 |
| 1 1/2 | -180° to 400° | Opaque | Orange | 00000000 | 00000 |
| 2 | -180° to 400° | Opaque | Orange | 00000000 | 00000 |
Viton® Fluoroelastomer Rubber | |||||
| 3/4 | -40° to 500° | Opaque | Brown | 00000000 | 00000 |
| 1 | -40° to 500° | Opaque | Brown | 00000000 | 00000 |
| 1 1/4 | -40° to 500° | Opaque | Brown | 00000000 | 00000 |
| 1 1/2 | -40° to 500° | Opaque | Brown | 00000000 | 00000 |
| 2 | -40° to 500° | Opaque | Brown | 00000000 | 00000 |