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Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.
Quick-Clamp High-Vacuum Fittings for Stainless Steel Tubing
- For Use With:
Fittings with Gasket End: Air, Argon, Helium, Nitrogen
All Other Fittings: Air - Specifications Met: ISO 2861
Instead of a gasket, these fittings have a metal-reinforced O-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). Made of 304 stainless steel, these 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).
Cross Connectors, Tube
- Temperature Range: 0° to 300° F
- Tubing: Use with 304/304L or 316/316L stainless steel
| For Tube OD | Flange OD | High-Vacuum Flange Size | High Vacuum Connection Type | Material | Max. Vacuum | Each | |
| 3/4" | 1.18" | 16 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | 4518K241 | 0000000 |
| 1" | 1.57" | 25 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | 4518K25 | 000000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | 4518K26 | 000000 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | 4518K27 | 000000 |
Clamps
Wing Nut
Lever
Lever with Lanyard
- Temperature Range: 0° to 300° F
- Tubing: Use with 304/304L stainless steel, 316/316L stainless steel, or aluminum
Clamps tighten by hand.
Lever clamps are also known as toggle clamps.
Clamps with lanyard let you secure the clamp to equipment.
| For Tube OD | For Flange OD | For High-Vacuum Flange Size | High Vacuum Connection Type | Material | Max. Vacuum | Lanyard Lg. | Each | |
Wing Nut | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/2", 3/4" | 1.18" | 10, 16 | ISO-KF | Aluminum | 10 -8 torr @ 72° F | __ | 4518K711 | 00000 |
| 1" | 1.57" | 25 | ISO-KF | Aluminum | 10 -8 torr @ 72° F | __ | 4518K72 | 00000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | Aluminum | 10 -8 torr @ 72° F | __ | 4518K73 | 00000 |
| 2" | 2.95" | 50 | ISO-KF | Aluminum | 10 -8 torr @ 72° F | __ | 4518K74 | 00000 |
Lever | ||||||||
| 1/2", 3/4" | 1.18" | 10, 16 | ISO-KF | Aluminum | 10 -8 torr @ 72° F | __ | 4518K75 | 00000 |
| 1" | 1.57" | 25 | ISO-KF | Aluminum | 10 -8 torr @ 72° F | __ | 4518K76 | 00000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | Aluminum | 10 -8 torr @ 72° F | __ | 4518K77 | 00000 |
| 2" | 2.95" | 50 | ISO-KF | Aluminum | 10 -8 torr @ 72° F | __ | 4518K78 | 00000 |
Lever with Lanyard | ||||||||
| 3/4" | 1.18" | 16 | ISO-KF | Aluminum | 10 -8 torr @ 72° F | 5 3/4" | 4518K965 | 00000 |
| 1" | 1.57" | 25 | ISO-KF | Aluminum | 10 -8 torr @ 72° F | 5 3/4" | 4518K966 | 00000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | Aluminum | 10 -8 torr @ 72° F | 5 3/4" | 4518K967 | 00000 |
| 2" | 2.95" | 50 | ISO-KF | Aluminum | 10 -8 torr @ 72° F | 5 3/4" | 4518K968 | 00000 |
Rings
Ring
Ring with Stainless Steel Screen
Ring with Aluminum Outer Ring
- Temperature Range:
Fittings with Viton® Fluoroelastomer Rubber O-Ring: 0° to 300° F
Fittings with Silicone Rubber O-Ring: -50° to 390°F - Tubing: Use with 304/304L stainless steel, 316/316L stainless steel, or aluminum
Use these rings with quick-clamp high-vacuum fittings. They consist of a stainless steel inner ring covered by an O-ring.
Silicone rings withstand higher temperatures than fluoroelastomer ones.
| For Tube OD | For Flange OD | For High-Vacuum Flange Size | High Vacuum Connection Type | Inner Ring Material | Max. Vacuum | Max. Pressure | Each | |
Viton® Fluoroelastomer Rubber O-Ring | ||||||||
|---|---|---|---|---|---|---|---|---|
Rings | ||||||||
| 3/4" | 1.18" | 16 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | Not Rated | 4518K621 | 00000 |
| 1" | 1.57" | 25 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | Not Rated | 4518K63 | 00000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | Not Rated | 4518K64 | 00000 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | Not Rated | 4518K65 | 00000 |
Rings with Stainless Steel Screen | ||||||||
| 3/4" | 1.18" | 16 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | Not Rated | 4518K815 | 00000 |
| 1" | 1.57" | 25 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | Not Rated | 4518K816 | 00000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | Not Rated | 4518K817 | 00000 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | Not Rated | 4518K818 | 00000 |
Rings with Aluminum Outer Ring | ||||||||
| 3/4" | 1.18" | 16 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | Not Rated | 4518K911 | 00000 |
| 1" | 1.57" | 25 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | 100 psi @ 72° F | 4518K67 | 00000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | 75 psi @ 72° F | 4518K68 | 00000 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | 50 psi @ 72° F | 4518K69 | 00000 |
Silicone Rubber O-Ring | ||||||||
Rings | ||||||||
| 3/4" | 1.18" | 16 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | Not Rated | 4518K767 | 00000 |
| 1" | 1.57" | 25 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | Not Rated | 4518K768 | 00000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | Not Rated | 4518K769 | 00000 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | Not Rated | 4518K771 | 00000 |
Hose
- Temperature Range: 0° to 300° F
- Tubing: Use with 304/304L stainless steel, 316/316L stainless steel, or aluminum
Hose absorbs moderate vibration
| For Tube OD | Flange OD | High-Vacuum Flange Size | 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 | 10 -8 torr @ 72° F | __ | Flexible | 4518K91 | 000000 |
4 3/16" Lg. | |||||||||
| 1" | 1.57" | 25 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | __ | Flexible | 4518K92 | 00000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | __ | Flexible | 4518K93 | 000000 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | __ | Flexible | 4518K94 | 000000 |
12" Lg. | |||||||||
| 3/4" | 1.18" | 16 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | 1 5/8" | Flexible | 4518K951 | 000000 |
| 1" | 1.57" | 25 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | 1 3/8" | Flexible | 4518K961 | 000000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | 2 1/2" | Flexible | 4518K971 | 000000 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | 3 1/4" | Flexible | 4518K981 | 000000 |
24" Lg. | |||||||||
| 3/4" | 1.18" | 16 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | 1 5/8" | Flexible | 4518K952 | 000000 |
| 1" | 1.57" | 25 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | 1 3/8" | Flexible | 4518K962 | 000000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | 2 1/2" | Flexible | 4518K972 | 000000 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | 3 1/4" | Flexible | 4518K982 | 000000 |
39" Lg. | |||||||||
| 3/4" | 1.18" | 16 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | 1 5/8" | Flexible | 4518K953 | 000000 |
| 1" | 1.57" | 25 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | 1 3/8" | Flexible | 4518K963 | 000000 |
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | 2 1/2" | Flexible | 4518K973 | 000000 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 10 -8 torr @ 72° F | 3 1/4" | Flexible | 4518K983 | 000000 |
Valves with Shut-Off
- Temperature Range: 0° to 190° F
- Tubing: Use with 304/304L or 316/316L stainless steel
Valves 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 | High-Vacuum Flange Size | High Vacuum Connection Type | Max. Vacuum | Body Material | Overall Ht. | Overall Lg. | Each | |
| Manual | 3/4" | 1 3/16" | 16 | ISO-KF | 10 -8 torr @ 72° F | 304 Stainless Steel | 4 1/8" | 2 1/4" | 4518K892 | 0000000 |
| Manual | 1" | 1 9/16" | 25 | ISO-KF | 10 -8 torr @ 72° F | 304 Stainless Steel | 5 5/8" | 3" | 4518K893 | 000000 |
| Manual | 1 1/2" | 2 1/8" | 40 | ISO-KF | 10 -8 torr @ 72° F | 304 Stainless Steel | 6 3/8" | 3 7/8" | 4518K894 | 000000 |
| Manual | 2" | 2 15/16" | 50 | ISO-KF | 10 -8 torr @ 72° F | 304 Stainless Steel | 8" | 4 1/2" | 4518K895 | 000000 |