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About Pipe and Fittings
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Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.
Claw-Clamp High-Vacuum Fittings for Stainless Steel Tubing
An alternative to bolt-together fittings, these fittings handle larger tube OD sizes 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.
Caps
| For Tube OD | Flange OD | High-Vacuum Flange Size | 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 | 10 -8 torr @ 72° F | 3705N11 | 000000 |
| 3" | 4.33" | 80 | ISO-K | 4 | 304 Stainless Steel | 10 -8 torr @ 72° F | 3705N12 | 00000 |
| 4" | 5.12" | 100 | ISO-K | 4 | 304 Stainless Steel | 10 -8 torr @ 72° F | 3705N13 | 00000 |
| 6" | 7.09" | 160 | ISO-K | 4 | 304 Stainless Steel | 10 -8 torr @ 72° F | 3705N14 | 000000 |
Rings
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 | 10 -8 torr @ 72° F | 400° | 3705N19 | 000000 |
| 3" | 4.33" | 80 | ISO-K | Viton® Fluoroelastomer Rubber | 304 Stainless Steel | 10 -8 torr @ 72° F | 400° | 3705N2 | 00000 |
| 4" | 5.12" | 100 | ISO-K | Viton® Fluoroelastomer Rubber | 304 Stainless Steel | 10 -8 torr @ 72° F | 400° | 3705N21 | 00000 |
| 6" | 7.09" | 160 | ISO-K | Viton® Fluoroelastomer Rubber | 304 Stainless Steel | 10 -8 torr @ 72° F | 400° | 3705N22 | 00000 |
Clamps
Double-Claw Clamp
Single-Claw Clamp
| 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 | 10 -8 torr @ 72° F | 3705N25 | 00000 |
| 6" | 7.09" | 160 | ISO-K | 18-8 Stainless Steel | 10 -8 torr @ 72° F | 3705N26 | 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 | 10 -8 torr @ 72° F | 3705N101 | 00000 |
Single Claw | |||||||
Aluminum | |||||||
| 2 1/2", 3", 4" | 3.74", 4.33", 5.12" | 63, 80, 100 | ISO-K | 18-8 Stainless Steel | 10 -8 torr @ 72° F | 3705N23 | 0000 |
| 6" | 7.09" | 160 | ISO-K | 18-8 Stainless Steel | 10 -8 torr @ 72° F | 3705N24 | 0000 |