How to Identify and Measure Fittings
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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.
Connectors have quick-connect fittings on both sides. Use them to connect two lengths of tubing: stainless steel to stainless steel, glass to glass, or go from one material to the other.
Adapters have a quick-connect fitting on one side and a quick-clamp fitting on the other. Use them to attach and remove components for one-off uses or to adapt your quick-clamp system to connect to glass tubing. Quick-clamp fittings are also known as KF, QF, and NW fittings; they require a clamp and ring (sold separately) to complete the connection.
For technical drawings and 3-D models, click on a part number.
Connectors | Replacement O-Rings | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | Wall Thick. | Max. Vacuum | Material | O-Ring Material | Temp. Range, °F | Each | Each | ||
| 1/4" | 0.118" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | Buna-N Rubber | -40° to 250° | 0000000 | 0000000 | 0000000 | 00000 |
| 1/2" | 0.078" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | Buna-N Rubber | -40° to 250° | 0000000 | 000000 | 0000000 | 0000 |
| 3/4" | 0.212" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | Buna-N Rubber | -40° to 250° | 0000000 | 000000 | 0000000 | 0000 |
| 1" | 0.18" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | Buna-N Rubber | -40° to 250° | 0000000 | 000000 | 0000000 | 0000 |
| 1 1/2" | 0.242" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | Buna-N Rubber | -40° to 250° | 0000000 | 000000 | 0000000 | 0000 |
| 2" | 0.242" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | Buna-N Rubber | -40° to 250° | 0000000 | 000000 | 0000000 | 0000 |
Adapters | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Quick Clamp Tube Connection | Replacement O-Rings | ||||||||||||
| For Tube OD (Quick Connect) | For Tube OD | Flange OD | High-Vacuum Flange Size | High Vacuum Connection Type | Wall Thick. | Max. Vacuum | Material | O-Ring Material | Temp. Range, °F | Each | Each | ||
| 1/4" | 3/4" | 1.18" | 16 | ISO-KF | 0.118" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | Buna-N Rubber | -40° to 250° | 0000000 | 0000000 | 0000000 | 00000 |
| 1/2" | 1" | 1.57" | 25 | ISO-KF | 0.118" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | Buna-N Rubber | -40° to 250° | 0000000 | 000000 | 0000000 | 0000 |
| 3/4" | 1" | 1.57" | 25 | ISO-KF | 0.055" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | Buna-N Rubber | -40° to 250° | 0000000 | 000000 | 0000000 | 0000 |
| 1" | 1" | 1.57" | 25 | ISO-KF | 0.055" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | Buna-N Rubber | -40° to 250° | 0000000 | 000000 | 0000000 | 0000 |
| 1 1/2" | 1 1/2" | 2.16" | 40 | ISO-KF | 0.055" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | Buna-N Rubber | -40° to 250° | 0000000 | 000000 | 0000000 | 0000 |
| 2" | 2" | 2.95" | 50 | ISO-KF | 0.118" | 1 × 10 -8 torr @ 72° F | 304 Stainless Steel | Buna-N Rubber | -40° to 250° | 0000000 | 000000 | 0000000 | 0000 |
| For Tube OD | For Flange OD | For High-Vacuum Flange Size | High Vacuum Connection Type | Material | Nut Material | Max. Vacuum | Temp. Range, °F | Specifications Met | Each | |
with Wing Nut | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2", 3/4" | 1.18" | 10, 16 | ISO-KF | Aluminum | Zinc Alloy | 1 × 10 -7 torr @ 72° F | 0° to 300° | ISO 2861 | 00000000 | 00000 |
| 1" | 1.57" | 25 | ISO-KF | Aluminum | Zinc Alloy | 1 × 10 -7 torr @ 72° F | 0° to 300° | ISO 2861 | 0000000 | 00000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | Aluminum | Zinc Alloy | 1 × 10 -7 torr @ 72° F | 0° to 300° | ISO 2861 | 0000000 | 00000 |
| 2" | 2.95" | 50 | ISO-KF | Aluminum | Zinc Alloy | 1 × 10 -7 torr @ 72° F | 0° to 300° | ISO 2861 | 0000000 | 00000 |
Material | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | For Flange OD | For High-Vacuum Flange Size | High Vacuum Connection Type | O-Ring | Inner Ring | Max. Vacuum | Temp. Range, °F | Specifications Met | Each | |
| 3/4" | 1.18" | 16 | ISO-KF | Fluoroelastomer Rubber | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 0° to 300° | ISO 2861 | 00000000 | 00000 |
| 1" | 1.57" | 25 | ISO-KF | Fluoroelastomer Rubber | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 0° to 300° | ISO 2861 | 0000000 | 00000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | Fluoroelastomer Rubber | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 0° to 300° | ISO 2861 | 0000000 | 00000 |
| 2" | 2.95" | 50 | ISO-KF | Fluoroelastomer Rubber | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 0° to 300° | ISO 2861 | 0000000 | 00000 |