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Connection Style Connection Style |
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Claw Clamp |
System of Measurement System of Measurement |
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Type Type |
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![]() | Clamp |
Material Material |
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Clamp Type Clamp Type |
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![]() | Bolt |
Shape Shape |
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![]() | Straight |
Length Length | Show |
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Length Length | Hide |
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Maximum Vacuum Maximum Vacuum |
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Claw Clamp Type Claw Clamp Type |
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High Vacuum Connection Type High Vacuum Connection Type |
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Bolt Material Bolt Material |
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Connection Type Connection Type |
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![]() | Tube |
DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Maximum Temperature Maximum Temperature |
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Minimum Temperature Minimum Temperature |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Sterilize With Sterilize With |
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Vacuum Rating Vacuum Rating |
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Maximum Pressure Maximum Pressure |
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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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Clamps for Claw-Clamp High-Vacuum Fittings for Stainless Steel Tubing
Connect claw-clamp high-vacuum fittings for an airtight seal. For a complete connection, you'll need four clamps and a ring (sold separately).
Double-claw clamps attach to the grooves on the fittings.
For technical drawings and 3-D models, click on a part number.
Clamps

Double-Claw Clamp
For Tube OD | For Flange OD | Trade Number | High Vacuum Connection Type | Material | Bolt Material | Max. Vacuum | Each | |
Double Claw | ||||||||
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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 |
Rings

Ring
Material | |||||||||
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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 |
High-Polish Gasket Fittings for Stainless Steel Tubing
- For Use With: Air, Dairy, Water
- Temperature Range: See Gaskets
- Tubing:
Inch Butt-Weld Fittings and Quick-Clamp Fittings: Use with welded 304/304L or 316/316L stainless steel that meets ASTM 269 or ASTM 27
Metric Butt-Weld Fittings: Use with welded or seamless 316 stainless steel - Specifications Met:
304 Stainless Steel Adapters, Caps, and Nuts: 3-A Certified 63-04
Gaskets: See table
Nuts
For Tube OD | Nut Material | Max. Pressure | Each | |
2 1/2" | 304 Stainless Steel | 400 psi @ 72° F | 000000000 | 000000 |
Gaskets
For Tube OD | ID | OD | Thick. | Temp. Range, °F | Color | Specifications Met | Each | |
Buna-N Rubber | ||||||||
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2 1/2" | 2.340" | 2.950" | 0.35" | -30° to 200° | Black | __ | 0000000 | 00000 |
PTFE Plastic | ||||||||
2 1/2" | 2.340" | 2.950" | 0.35" | -100° to 500° | White | 3-A Certified 20-27 | 0000000 | 0000 |
316 Stainless Steel/PTFE Plastic Blend | ||||||||
2 1/2" | 2.340" | 2.950" | 0.32" | -350° to 550° | Gray | 3-A Certified 20-27, FDA Compliant 21 CFR 177.1550, USP VI Certified | 0000000 | 00000 |