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.
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.
316 stainless steel clamps have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
| For Tube OD | For Flange OD | For High-Vacuum Flange Size | High Vacuum Connection Type | Bolt Material | Max. Vacuum | Each | |
Double Claw | |||||||
|---|---|---|---|---|---|---|---|
Aluminum  | |||||||
| 2 1/2", 3", 4" | 3.74", 4.33", 5.12" | 63, 80, 100 | ISO-K | 18-8 Stainless Steel | 1 × 10 -9 torr @ 72° F | 0000000 | 00000 |
| 6" | 7.09" | 160 | ISO-K | 18-8 Stainless Steel | 1 × 10 -9 torr @ 72° F | 0000000 | 0000 |
316 Stainless Steel | |||||||
| 2 1/2", 3", 4", 6", 8", 10" | 3.74", 4.33", 5.12", 7.09", 9.45", 11.42" | 63, 80, 100, 160, 200, 250 | ISO-K | 316 Stainless Steel | 1 × 10 -8 torr @ 72° F | 00000000 | 00000 |
| 12 3/4", 16", 20" | 14.57", 17.72", 21.65" | 320, 400, 500 | ISO-K | 316 Stainless Steel | 1 × 10 -8 torr @ 72° F | 00000000 | 00000 |
Single Claw | |||||||
Aluminum | |||||||
| 2 1/2", 3", 4" | 3.74", 4.33", 5.12" | 63, 80, 100 | ISO-K | 18-8 Stainless Steel | 1 × 10 -9 torr @ 72° F | 0000000 | 0000 |
| 6" | 7.09" | 160 | ISO-K | 18-8 Stainless Steel | 1 × 10 -9 torr @ 72° F | 0000000 | 0000 |
Material | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | For Flange OD | For High-Vacuum Flange Size | 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 |
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 | High-Vacuum Flange Size | Wall Thick. | High Vacuum Connection Type | No. of Claw Clamps Required | Material | Max. Vacuum | Each | |
| 2 1/2" | 3.74" | 63 | 0.065" | ISO-K | 4 | 304 Stainless Steel | 1 × 10 -9 torr @ 72° F | 0000000 | 000000 |
| 3" | 4.33" | 80 | 0.065" | ISO-K | 4 | 304 Stainless Steel | 1 × 10 -9 torr @ 72° F | 0000000 | 000000 |
| 4" | 5.12" | 100 | 0.083" | ISO-K | 4 | 304 Stainless Steel | 1 × 10 -9 torr @ 72° F | 0000000 | 000000 |
| 6" | 7.09" | 160 | 0.083" | ISO-K | 4 | 304 Stainless Steel | 1 × 10 -9 torr @ 72° F | 0000000 | 000000 |
Material | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | For Flange OD | For High-Vacuum Flange Size | 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 | For High-Vacuum Flange Size | High Vacuum Connection Type | Bolt Material | Max. Vacuum | Each | |
Double Claw | |||||||
|---|---|---|---|---|---|---|---|
Aluminum | |||||||
| 2 1/2", 3", 4" | 3.74", 4.33", 5.12" | 63, 80, 100 | ISO-K | 18-8 Stainless Steel | 1 × 10 -9 torr @ 72° F | 0000000 | 00000 |
| 6" | 7.09" | 160 | ISO-K | 18-8 Stainless Steel | 1 × 10 -9 torr @ 72° F | 0000000 | 0000 |
Single Claw | |||||||
Aluminum | |||||||
| 2 1/2", 3", 4" | 3.74", 4.33", 5.12" | 63, 80, 100 | ISO-K | 18-8 Stainless Steel | 1 × 10 -9 torr @ 72° F | 0000000 | 0000 |
| 6" | 7.09" | 160 | ISO-K | 18-8 Stainless Steel | 1 × 10 -9 torr @ 72° F | 0000000 | 0000 |