Material Material |
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For Tube OD For Tube OD |
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Connection Style Connection Style |
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| Butt Weld |
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| Quick Clamp |
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| Quick Connect |
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| Gasket |
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| Claw Clamp |
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| Flanged |
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| Yor-Lok |
For Tube Material For Tube Material |
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Length Length |
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Maximum Vacuum Maximum Vacuum |
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For Use With For Use With |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Maximum Pressure Maximum Pressure |
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Sterilize With Sterilize With |
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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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Butt-Weld Fittings for Stainless Steel Tubing
- For Use With: See table
- Max. Temperature: 250° F, except hose fittings are unrated.
- Tubing:
304 Stainless Steel: Use with 304/304L stainless steel that meets ASTM A213, ASTM A269, or ASTM A270, except DIN EN 10357 fittings with only ASTM A269 or ASTM A270
316 Stainless Steel: Use with 316/316L stainless steel that meets ASTM A213, ASTM A269, or ASTM A270, except ASME BPE and DIN EN 10357 fittings with only ASTM A269 or ASTM A270 - Specifications Met: See table
Weld these fittings to tubing for a permanent, flush connection that permits smooth flow through a line.
304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
DIN EN 10357 fittings meet an international standard for butt-weld fitting specifications. This standard is common in the food and chemical industries.
For technical drawings and 3-D models, click on a part number.
| For Tube OD | Max. Pressure | Max. Vacuum | Wall Thick. | For Use With | Specifications Met | Each | |
304/304L Stainless Steel | |||||||
|---|---|---|---|---|---|---|---|
Polished | |||||||
| 1" | 600 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 000000 |
| 1 1/2" | 600 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 2" | 550 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 2 1/2" | 450 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 3" | 350 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 4" | 250 psi @ 72° F | 10 -6 torr @ 72° F | 0.083" | Air, Food, Water | __ | 00000000 | 00000 |
| 19mm | Not Rated | Not Rated | 1.5mm | Dairy, Food | DIN EN 10253-4 | 00000000 | 00000 |
| 23mm | Not Rated | Not Rated | 1.5mm | Dairy, Food | DIN EN 10253-4 | 00000000 | 00000 |
| 29mm | Not Rated | Not Rated | 1.5mm | Dairy, Food | DIN EN 10253-4 | 00000000 | 00000 |
| 35mm | Not Rated | Not Rated | 1.5mm | Dairy, Food | DIN EN 10253-4 | 00000000 | 00000 |
| 41mm | Not Rated | Not Rated | 1.5mm | Dairy, Food | DIN EN 10253-4 | 00000000 | 00000 |
| 53mm | Not Rated | Not Rated | 1.5mm | Dairy, Food | DIN EN 10253-4 | 00000000 | 00000 |
| 70mm | Not Rated | Not Rated | 2mm | Dairy, Food | DIN EN 10253-4 | 00000000 | 00000 |
| 85mm | Not Rated | Not Rated | 2mm | Dairy, Food | DIN EN 10253-4 | 00000000 | 00000 |
| 104mm | Not Rated | Not Rated | 2mm | Dairy, Food | DIN EN 10253-4 | 00000000 | 00000 |
Dull | |||||||
| 1" | 600 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 1 1/2" | 600 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 2" | 550 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 2 1/2" | 450 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 3" | 350 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 4" | 250 psi @ 72° F | 10 -6 torr @ 72° F | 0.083" | Air, Food, Water | __ | 00000000 | 00000 |
| 6" | 120 psi @ 72° F | 10 -6 torr @ 72° F | 0.109" | Air, Food, Water | __ | 00000000 | 000000 |
316/316L Stainless Steel | |||||||
Polished | |||||||
| 1/2" | 1,200 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 3/4" | 1,000 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 1" | 600 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 0000000 | 00000 |
| 1 1/2" | 600 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 0000000 | 00000 |
| 2" | 550 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 0000000 | 00000 |
| 2 1/2" | 450 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 0000000 | 00000 |
| 3" | 350 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 0000000 | 00000 |
| 4" | 250 psi @ 72° F | 10 -6 torr @ 72° F | 0.083" | Air, Food, Water | __ | 0000000 | 00000 |
| 6" | 120 psi @ 72° F | 10 -6 torr @ 72° F | 0.109" | Air, Food, Water | __ | 0000000 | 000000 |
| 19mm | Not Rated | Not Rated | 1.5mm | Dairy, Food | DIN EN 10253-4 | 0000000 | 00000 |
| 23mm | Not Rated | Not Rated | 1.5mm | Dairy, Food | DIN EN 10253-4 | 0000000 | 00000 |
| 29mm | Not Rated | Not Rated | 1.5mm | Dairy, Food | DIN EN 10253-4 | 0000000 | 00000 |
| 35mm | Not Rated | Not Rated | 1.5mm | Dairy, Food | DIN EN 10253-4 | 0000000 | 00000 |
| 41mm | Not Rated | Not Rated | 1.5mm | Dairy, Food | DIN EN 10253-4 | 0000000 | 00000 |
| 53mm | Not Rated | Not Rated | 1.5mm | Dairy, Food | DIN EN 10253-4 | 0000000 | 00000 |
| 70mm | Not Rated | Not Rated | 2mm | Dairy, Food | DIN EN 10253-4 | 0000000 | 00000 |
| 85mm | Not Rated | Not Rated | 2mm | Dairy, Food | DIN EN 10253-4 | 0000000 | 00000 |
| 104mm | Not Rated | Not Rated | 2mm | Dairy, Food | DIN EN 10253-4 | 0000000 | 00000 |
Dull | |||||||
| 1/2" | 1,200 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 3/4" | 1,000 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 1" | 600 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 1 1/2" | 600 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 2" | 550 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 2 1/2" | 450 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 3" | 350 psi @ 72° F | 10 -6 torr @ 72° F | 0.065" | Air, Food, Water | __ | 00000000 | 00000 |
| 4" | 250 psi @ 72° F | 10 -6 torr @ 72° F | 0.083" | Air, Food, Water | __ | 00000000 | 00000 |
| 6" | 120 psi @ 72° F | 10 -6 torr @ 72° F | 0.109" | Air, Food, Water | __ | 00000000 | 000000 |
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.
| For Tube OD | Flange OD | Trade Number | High Vacuum Connection Type | Material | Max. Vacuum | Each | |
| 1/2" | 1.18" | 10 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 00000000 | 00000 |
| 3/4" | 1.18" | 16 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 00000000 | 0000 |
| 1" | 1.57" | 25 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 0000000 | 00000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 0000000 | 00000 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 0000000 | 00000 |
Clamps (sold separately) tighten by hand. Spring-loaded clamps are also known as toggle clamps.
| For Tube OD | For Flange OD | Trade Number | High Vacuum Connection Type | Material | Max. Vacuum | Lanyard Length | Each | |
with Wing Nut | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/2" | 1.18" | 10 | ISO-KF | Aluminum | 1 × 10 -7 torr @ 72° F | __ | 00000000 | 00000 |
| 1/2", 3/4" | 1.18" | 10, 16 | ISO-KF | Aluminum | 1 × 10 -7 torr @ 72° F | __ | 00000000 | 0000 |
| 3/4" | 1.18" | 16 | ISO-KF | Aluminum | 1 × 10 -7 torr @ 72° F | __ | 00000000 | 0000 |
| 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 |
| 2" | 2.95" | 50 | ISO-KF | Aluminum | 1 × 10 -7 torr @ 72° F | __ | 0000000 | 00000 |
Spring Loaded | ||||||||
| 1/2" | 1.18" | 10 | ISO-KF | Aluminum | 1 × 10 -7 torr @ 72° F | __ | 0000000 | 00000 |
| 1/2", 3/4" | 1.18" | 10, 16 | ISO-KF | Aluminum | 1 × 10 -7 torr @ 72° F | __ | 0000000 | 00000 |
| 3/4" | 1.18" | 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 |
| 2" | 2.95" | 50 | 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 |
Rings (sold separately) consist of a stainless steel inner ring covered by a fluoroelastomer O-ring. Rings with screen have a stainless steel screen to filter out large particles. Pressure-rated rings have an aluminum outer ring to withstand extra pressure.
| For Tube OD | For Flange OD | Trade Number | High Vacuum Connection Type | Inner Ring Material | Max. Vacuum | Max. Pressure | Each | |
Rings | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/2" | 1.18" | 10 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | Not Rated | 00000000 | 00000 |
| 3/4" | 1.18" | 16 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | Not Rated | 00000000 | 0000 |
| 1" | 1.57" | 25 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | Not Rated | 0000000 | 0000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | Not Rated | 0000000 | 00000 |
| 2" | 2.95" | 50 | 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 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | Not Rated | 00000000 | 00000 |
Rings with Aluminum Outer Ring | ||||||||
| 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 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 50 psi @ 72° F | 0000000 | 00000 |
Hose (sold separately) absorbs moderate vibration
| For Tube OD | Flange OD | Trade Number | 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 |
| 2" | 2.95" | 50 | 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 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 3 1/4" | 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 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 3 1/4" | 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 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 3 1/4" | Flexible | 00000000 | 000000 |
Valves (sold separately) are also known as vacuum isolation valves. They connect to a vacuum system so you can install gauges, release gases, and remove air. They operate manually and have a compact body that fits easily into tight spaces.
| Actuation | For Tube OD | Flange OD | Trade Number | Max. Vacuum | Body Material | Overall Ht. | Overall Lg. | Each | |
| Manual | 3/4" | 1 3/16" | 16 | 10 -7 torr @ 72° F | 304 Stainless Steel | 4 1/8" | 2 1/4" | 00000000 | 0000000 |
| Manual | 1" | 1 9/16" | 25 | 10 -7 torr @ 72° F | 304 Stainless Steel | 5 5/8" | 3" | 00000000 | 000000 |
| Manual | 1 1/2" | 2 1/8" | 40 | 10 -7 torr @ 72° F | 304 Stainless Steel | 6 3/8" | 3 7/8" | 00000000 | 000000 |
| Manual | 2" | 2 15/16" | 50 | 10 -7 torr @ 72° F | 304 Stainless Steel | 8" | 4 1/2" | 00000000 | 000000 |
Quick-Connect High-Vacuum Fittings for Stainless Steel Tubing
Twist these fittings onto high-vacuum tubing to quickly make sealed, high-vacuum connections without the need for clamping, welding, or tools. To connect, insert your tubing into the fitting and twist the collar on the end of the fitting; an O-ring on the inside of the fitting compresses to form the seal. Also known as quick-disconnects, they're as easy to twist off as they are to twist on. Not for use in pressure applications.
Plugs fit inside the end of a quick-connect fitting to block it off when not in use.
| OD | Max. Vacuum | Material | Each | |
| 1/4" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | 0000000 | 000000 |
| 1/2" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | 0000000 | 00000 |
| 3/4" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | 0000000 | 00000 |
| 1" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | 0000000 | 00000 |
| 1 1/2" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | 0000000 | 00000 |
| 2" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | 0000000 | 00000 |
Ultra-High-Polish Gasket Fittings for Stainless Steel Tubing
- For Use With: Argon, Helium, Nitrogen
- Temperature Range: -420° to 1000° F
- Tubing: Use with 316/316L stainless steel
- Compatible With: Swagelok® VCR
The 15 Ra finish on the interior of these fittings creates an ultra-smooth surface. Also known as ultra-high-purity fittings, they are packed in a Class 100 clean room to prevent contamination. They are commonly used in semiconductor applications. Fittings use a metal gasket (sold separately), which generates fewer particles than a rubber gasket and creates a strong seal in high-pressure and high-vacuum applications. Fittings are 316 stainless steel for excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Ultra-High-Vacuum Flanges and Fittings for Stainless Steel Tubing
- For Use With: Air
- Temperature Range:
Flanges: -300° to 800° F
Gaskets: Not Rated - Tubing: Use with 304/304L and 316/316L stainless steel
- Specifications Met:
Flanges: ASTM A240, ASTM E45, ASTM E12
Gaskets: ASTM B152-179, ASTM F68
Create access points in ultra-high-vacuum lines or chambers by bolting two same-size flanges together with a copper gasket (sold separately) between them. The flanges’ sharp edges dig into the copper gasket and form an extremely tight seal, which means they handle higher vacuum pressures than other high-vacuum fittings with rubber gaskets. Also known as CF, Conflat, and UHV fittings, use them in vacuum coating, heat treating, and drying applications, as well as for leak testing and analyzing gases. They’re stainless steel so they resist rusting.
Caps are also known as blind flanges.
Bolt kits are required to make a complete connection.
For technical drawings and 3-D models, click on a part number.
Bolt Hole | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | Flange OD | Trade Number | High Vacuum Connection Type | Bolt Circle Dia. | Dia. | No. of | Bolts Included | No. of Bolt Kits Required | Lg. | Max. Vacuum | Material | Appearance | Each | |
Fixed | ||||||||||||||
| 3/4" | 1 21/64" | 16 | CF | 1 1/16" | 11/64" | 6 | No | 1 | 5/16" | 1 × 10 -13 torr @72° F | 304 Stainless Steel | Polished | 0000000 | 000000 |
| 1 1/2" | 2 3/4" | 40 | CF | 2 5/16" | 17/64" | 6 | No | 1 | 1/2" | 1 × 10 -13 torr @72° F | 304 Stainless Steel | Polished | 0000000 | 00000 |
| 2 1/2" | 4 1/2" | 63 | CF | 3 5/8" | 21/64" | 8 | No | 1 | 11/16" | 1 × 10 -13 torr @72° F | 304 Stainless Steel | Polished | 0000000 | 00000 |
| 4" | 6" | 100 | CF | 5 1/8" | 21/64" | 16 | No | 2 | 25/32" | 1 × 10 -13 torr @72° F | 304 Stainless Steel | Polished | 0000000 | 000000 |
| For Flange OD | For Trade Number | Bolt Dia. | Thread Size | No. of Bolts Included | No. of Nuts Included | No. of Washers Included | Bolt Material | Each | |
| 1 21/64" | 16 | 0.167" | 8"-32 | 6 | 6 | 12 | 18-8 Stainless Steel | 0000000 | 00000 |
| 2 3/4" | 40 | 1/4" | 1/4"-28 | 6 | 6 | 12 | 18-8 Stainless Steel | 0000000 | 00000 |
| 4 1/2" | 63 | 5/16" | 5/16"-24 | 8 | 8 | 16 | 18-8 Stainless Steel | 0000000 | 00000 |
| 6" | 100 | 5/16" | 5/16"-24 | 8 | 8 | 16 | 18-8 Stainless Steel | 0000000 | 00000 |
Claw-Clamp High-Vacuum Fittings for Stainless Steel Tubing
An alternative to bolt-together fittings, these handle larger tube OD sizes and have higher vacuum ratings than quick-clamp fittings. Also known as ISO-K high-vacuum fittings, the clamps have claws that grab hold of fittings with flanged ends. To complete a connection, use a ring and four clamps (sold separately). Not for use in pressure applications.
Double-claw clamps attach to the grooves on the fittings.
Single-claw clamps have a clamp on one end and an exposed bolt on the other. Thread the bolt-end directly into the body of pumps, valves, or other high-vacuum components.
For technical drawings and 3-D models, click on a part number.
| For Tube OD | Flange OD | Trade Number | High Vacuum Connection Type | No. of Claw Clamps Required | Material | Max. Vacuum | Each | |
| 2 1/2" | 3.74" | 63 | ISO-K | 4 | 304 Stainless Steel | 1 × 10 -9 torr @ 72° F | 0000000 | 000000 |
| 3" | 4.33" | 80 | ISO-K | 4 | 304 Stainless Steel | 1 × 10 -9 torr @ 72° F | 0000000 | 00000 |
| 4" | 5.12" | 100 | ISO-K | 4 | 304 Stainless Steel | 1 × 10 -9 torr @ 72° F | 0000000 | 00000 |
| 6" | 7.09" | 160 | ISO-K | 4 | 304 Stainless Steel | 1 × 10 -9 torr @ 72° F | 0000000 | 000000 |
Material | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | For Flange OD | Trade Number | High Vacuum Connection Type | O-Ring | Inner Ring | Max. Vacuum | Max. Temp., °F | Each | |
| 2 1/2" | 3.74" | 63 | ISO-K | Viton® Fluoroelastomer Rubber | 304 Stainless Steel | 1 × 10 -9 torr @ 72° F | 400° | 0000000 | 000000 |
| 3" | 4.33" | 80 | ISO-K | Viton® Fluoroelastomer Rubber | 304 Stainless Steel | 1 × 10 -9 torr @ 72° F | 400° | 000000 | 00000 |
| 4" | 5.12" | 100 | ISO-K | Viton® Fluoroelastomer Rubber | 304 Stainless Steel | 1 × 10 -9 torr @ 72° F | 400° | 0000000 | 00000 |
| 6" | 7.09" | 160 | ISO-K | Viton® Fluoroelastomer Rubber | 304 Stainless Steel | 1 × 10 -9 torr @ 72° F | 400° | 0000000 | 00000 |
| For Tube OD | For Flange OD | Trade Number | High Vacuum Connection Type | Material | Bolt Material | Max. Vacuum | Each | |
Double Claw | ||||||||
|---|---|---|---|---|---|---|---|---|
| 2 1/2", 3", 4" | 3.74", 4.33", 5.12" | 63, 80, 100 | ISO-K | Aluminum | 18-8 Stainless Steel | 1 × 10 -9 torr @ 72° F | 0000000 | 00000 |
| 6" | 7.09" | 160 | ISO-K | Aluminum | 18-8 Stainless Steel | 1 × 10 -9 torr @ 72° F | 0000000 | 0000 |
Single Claw | ||||||||
| 2 1/2", 3", 4" | 3.74", 4.33", 5.12" | 63, 80, 100 | ISO-K | Aluminum | 18-8 Stainless Steel | 1 × 10 -9 torr @ 72° F | 0000000 | 0000 |
| 6" | 7.09" | 160 | ISO-K | Aluminum | 18-8 Stainless Steel | 1 × 10 -9 torr @ 72° F | 0000000 | 0000 |
Bolt-Together High-Vacuum Fittings for Stainless Steel Tubing
For high-vacuum systems with tube sizes too large for quick-clamp (KF) fittings, choose these bolt-together fittings. Also known as ISO-F flanges, these fittings work with tube sizes starting at 2 1/2" OD and are rated for higher levels of vacuum than quick-clamp fittings. Not for use in pressure applications.
To complete the bolt-end connection, you'll need a ring and a bolt kit (both sold separately).
For technical drawings and 3-D models, click on a part number.
Caps | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Bolt Hole | Bolt Kits | |||||||||||||
| For Tube OD | Flange OD | Trade Number | High Vacuum Connection Type | Material | Max. Vacuum | Bolt Circle Dia. | Dia. | No. of | For Bolt Dia. | Bolts Included | Each | Each | ||
| 2 1/2" | 5.12" | 63 | ISO-F | 304 Stainless Steel | 1 × 10 -9 torr @ 72° F | 4 21/64" | 23/64" | 4 | 5/16" | No | 0000000 | 000000 | 0000000 | 000000 |
| 3" | 5.71" | 80 | ISO-F | 304 Stainless Steel | 1 × 10 -9 torr @ 72° F | 4 59/64" | 23/64" | 8 | 5/16" | No | 0000000 | 000000 | 0000000 | 00000 |
| 4" | 6 1/2" | 100 | ISO-F | 304 Stainless Steel | 1 × 10 -9 torr @ 72° F | 5 45/64" | 23/64" | 8 | 5/16" | No | 0000000 | 000000 | 0000000 | 00000 |
| 6" | 8.86" | 160 | ISO-F | 304 Stainless Steel | 1 × 10 -9 torr @ 72° F | 7 7/8" | 7/16" | 8 | 3/8" | No | 0000000 | 000000 | 0000000 | 00000 |
Material | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | For Flange OD | Trade Number | High Vacuum Connection Type | O-Ring | Inner Ring | Max. Vacuum | Max. Temp., °F | Each | |
| 2 1/2" | 5.12" | 63 | ISO-F | Viton® Fluoroelastomer Rubber | 304 Stainless Steel | 1 × 10 -9 torr @ 72° F | 400° | 0000000 | 000000 |
| 3" | 5.71" | 80 | ISO-F | Viton® Fluoroelastomer Rubber | 304 Stainless Steel | 1 × 10 -9 torr @ 72° F | 400° | 000000 | 00000 |
| 4" | 6.5" | 100 | ISO-F | Viton® Fluoroelastomer Rubber | 304 Stainless Steel | 1 × 10 -9 torr @ 72° F | 400° | 0000000 | 00000 |
| 6" | 8.86" | 160 | ISO-F | Viton® Fluoroelastomer Rubber | 304 Stainless Steel | 1 × 10 -9 torr @ 72° F | 400° | 0000000 | 00000 |
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 technical drawings and 3-D models, click on a part number.
- 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
Caps for tubing have a nut and a sleeve so you can close off the end of your tubing in place of a fitting. Caps for fittings replace the nut and sleeve of an existing fitting.
For Tube | ||||||
|---|---|---|---|---|---|---|
| OD | Wall Thick. | Material | Max. Pressure | Temp. Range, °F | Each | |
For Tubing | ||||||
| 3mm | 0.5mm | 316 Stainless Steel | 9,700 psi @ 72° F | -420° to 1200° | 00000000 | 000000 |
| 4mm | 1mm | 316 Stainless Steel | 3,500 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 6mm | 1mm | 316 Stainless Steel | 4,000 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 8mm | 1mm | 316 Stainless Steel | 3,000 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 10mm | 0.5mm | 316 Stainless Steel | 2,500 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 12mm | 0.5mm | 316 Stainless Steel | 2,000 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 14mm | 1 to 2 mm | 316 Stainless Steel | 2,300 psi @ 72° F | -420° to 1200° | 0000000 | 00000 |
| 15mm | 1 to 2 mm | 316 Stainless Steel | 2,100 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 16mm | 1.5 to 2.5 mm | 316 Stainless Steel | 3,300 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 18mm | 1.5 to 2.5 mm | 316 Stainless Steel | 2,900 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 20mm | 1.5 to 2.5 mm | 316 Stainless Steel | 2,600 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 22mm | 1.5 to 2.5 mm | 316 Stainless Steel | 2,300 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 25mm | 2 to 3 mm | 316 Stainless Steel | 2,900 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
For Fitting | ||||||
| 3mm | 0.5mm | 316 Stainless Steel | 9,700 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 4mm | 1mm | 316 Stainless Steel | 3,500 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 | 00000 |
| 14mm | 1 to 2 mm | 316 Stainless Steel | 2,300 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 15mm | 1 to 2 mm | 316 Stainless Steel | 2,100 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 16mm | 1.5 to 2.5 mm | 316 Stainless Steel | 3,300 psi @ 72° F | -420° to 1200° | 0000000 | 00000 |
| 18mm | 1.5 to 2.5 mm | 316 Stainless Steel | 2,900 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 20mm | 1.5 to 2.5 mm | 316 Stainless Steel | 2,600 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 22mm | 1.5 to 2.5 mm | 316 Stainless Steel | 2,300 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 25mm | 2 to 3 mm | 316 Stainless Steel | 2,900 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
For Tube | ||||||
|---|---|---|---|---|---|---|
| OD | Wall Thick. | Nut Material | Max. Pressure | Temp. Range, °F | Each | |
| 3mm | 0.5mm | 316 Stainless Steel | 4,000 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 4mm | 1mm | 316 Stainless Steel | 3,500 psi @ 72° F | -420° to 1200° | 00000000 | 0000 |
| 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 |
| 14mm | 1.5mm | 316 Stainless Steel | 2,000 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 15mm | 1 to 2 mm | 316 Stainless Steel | 2,100 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 16mm | Not Rated | 316 Stainless Steel | 2,000 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 18mm | 1.5 to 2.5 mm | 316 Stainless Steel | 2,900 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 22mm | Not Rated | 316 Stainless Steel | 2,000 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 25mm | 2 to 3 mm | 316 Stainless Steel | 2,900 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
For Tube | ||||||
|---|---|---|---|---|---|---|
| OD | Wall Thick. | Sleeve Material | Max. Pressure | Temp. Range, °F | Each | |
| 3mm | 0.5mm | 316 Stainless Steel | 4,000 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 4mm | 1mm | 316 Stainless Steel | 3,500 psi @ 72° F | -420° to 1200° | 00000000 | 0000 |
| 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 |
| 14mm | 1.5mm | 316 Stainless Steel | 2,000 psi @ 72° F | -420° to 1200° | 00000000 | 0000 |
| 15mm | 1 to 2 mm | 316 Stainless Steel | 2,100 psi @ 72° F | -420° to 1200° | 00000000 | 0000 |
| 16mm | 2mm | 316 Stainless Steel | 2,000 psi @ 72° F | -420° to 1200° | 00000000 | 0000 |
| 18mm | 1.5 to 2.5 mm | 316 Stainless Steel | 2,900 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 20mm | 1.5 to 2.5 mm | 316 Stainless Steel | 2,600 psi @ 72° F | -420° to 1200° | 0000000 | 00000 |
| 22mm | 1.5 to 2.5 mm | 316 Stainless Steel | 2,000 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |
| 25mm | 2 to 3 mm | 316 Stainless Steel | 2,900 psi @ 72° F | -420° to 1200° | 00000000 | 00000 |