How to Identify and Measure Fittings
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High-Polish Metal Quick-Clamp Sanitary Tube Fittings
- Temperature Range: See Gaskets
The smooth finish inside these fittings makes it easy to remove product residue. Also known as aseptic and tri-clamp fittings, they connect with a gasket, a clamp, and another quick-clamp fitting for a fast and easy way to access your line. The pressure rating of the fitting will vary depending on the clamp you choose, and the temperature rating will vary based on the gasket material you choose.
304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
Note: To complete a connection, you’ll need two quick-clamp fittings, a clamp, and a gasket (all sold separately).
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Beverage, Food, Water
- Tubing: Use with welded 304/304L or 316/316L stainless steel that meets ASTM A269 or ASTM 270
Expand-to-connect fittings are also known as nonrecess or roll-on ferrules. To connect, insert metal tubing into the fitting and use an expansion tool (sold separately) to press the tubing into the fitting wall.
Recessed Nut, Hole for
Lockout, and 2-Pin Hinge
Clamps with wing nut tighten by hand. Clamps with bolt tighten with a wrench. They handle higher pressures than wing-nut clamps for a stronger, more secure hold.
| For Tube OD | For Flange OD | Bolt Material | Max. Pressure | For Tube Specifications Met | Specifications Met | Each | |
304 Stainless Steel with Wing Nut | |||||||
|---|---|---|---|---|---|---|---|
| 1", 1 1/4", 1 1/2" | 1.984" | __ | 500 psi @ 72 ° F | ASTM A269, ASTM A270 | __ | 00000000 | 000000 |
304 Stainless Steel with Wing Nut, Spring Loaded | |||||||
| 1", 1 1/4", 1 1/2" | 1.984" | __ | 500 psi @ 72 ° F | ASTM A269, ASTM A270 | __ | 0000000 | 00000 |
304 Stainless Steel with Bolt | |||||||
| 1", 1 1/4", 1 1/2" | 1.984" | 304 Stainless Steel | 1,500 psi @ 72 ° F | ASTM A269, ASTM A270 | __ | 00000000 | 00000 |
316 Stainless Steel with Wing Nut and 2-Pin Hinge | |||||||
| 1", 1 1/4", 1 1/2" | 1.984" | __ | 700 psi @ 72 ° F | __ | __ | 0000000 | 00000 |
316 Stainless Steel with Safety Wing Nut and 2-Pin Hinge | |||||||
| 1", 1 1/4", 1 1/2" | 1.984" | __ | 720 psi @ 72 ° F | __ | __ | 0000000 | 00000 |
316 Stainless Steel with Double Bolt | |||||||
| 1", 1 1/4", 1 1/2" | 1.984" | 316 Stainless Steel | 2,400 psi @ 72 ° F | __ | ASME BPVC.VIII | 0000000 | 000000 |
316 Stainless Steel with Recessed Nut, Hole for Lockout, and 2-Pin Hinge | |||||||
| 1", 1 1/4", 1 1/2" | 1.984" | __ | 720 psi @ 72 ° F | __ | __ | 0000000 | 00000 |
White Nylon Plastic with Wing Nut | |||||||
| 1", 1 1/4", 1 1/2" | 1.984" | __ | 150 psi @ 72 ° F | ASTM A269, ASTM A270 | __ | 00000000 | 00000 |
Buna-N gaskets are oil resistant. EPDM gaskets resist water and steam and work well in humid environments. Silicone gaskets withstand high temperatures. Fluoroelastomer gaskets stand up to fuel, oil, and acid condensates. PTFE gaskets withstand harsh chemicals, with the exception of molten alkali metal and elemental fluorine.
| For Tube OD | ID | OD | Thick. | Temp. Range, °F | Color | Specifications Met | Each | |
Buna-N Rubber | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1" | 0.900" | 1.980" | 0.203" | -30° to 200° | Black | 3-A Certified 18-03, FDA Compliant 21 CFR 177.1550, FDA Compliant 21 CFR 177.2600 | 0000000 | 00000 |
EPDM Rubber | ||||||||
| 1" | 0.900" | 1.980" | 0.203" | -20° to 300° | Black | 3-A Certified 18-03, FDA Compliant 21 CFR 177.1550, FDA Compliant 21 CFR 177.2600 | 0000000 | 0000 |
Silicone Rubber | ||||||||
| 1" | 0.900" | 1.980" | 0.203" | -40° to 450° | Clear | 3-A Certified 18-03, FDA Compliant 21 CFR 177.1550, FDA Compliant 21 CFR 177.2600 | 0000000 | 0000 |
Fluoroelastomer Rubber | ||||||||
| 1" | 0.900" | 1.980" | 0.203" | -15° to 400° | Black | 3-A Certified 18-03, FDA Compliant 21 CFR 177.2600 | 0000000 | 0000 |
PTFE Plastic | ||||||||
| 1" | 0.900" | 1.980" | 0.203" | -100° to 500° | White | 3-A Certified 20-27, FDA Compliant 21 CFR 177.1550 | 00000000 | 0000 |
For Tube OD | |||||||
|---|---|---|---|---|---|---|---|
| Gasket Connection | Standard Connection | Wall Thick. | Material | For Tube Specifications Met | Includes | Each | |
| 1" | 1" | 0.065" | 316 Stainless Steel | ASTM A269, ASTM A270 | 304 Stainless Steel Nut | 0000000 | 0000000 |
For Tube OD | ||||||
|---|---|---|---|---|---|---|
| Gasket Connection | Standard Connection | Wall Thick. | Material | For Tube Specifications Met | Each | |
| 1" | 1" | 0.065" | 316 Stainless Steel | ASTM A269, ASTM A270 | 0000000 | 000000 |
Flange OD | |||||||
|---|---|---|---|---|---|---|---|
| For Tube OD | Extra-Support Connection | Standard Connection | Wall Thick. | Material | For Tube Specifications Met | Each | |
| 1" | 1.995" | 1.984" | 0.065" | 316 Stainless Steel | ASTM A269, ASTM A270 | 0000000 | 000000 |
Flange OD | |||||||
|---|---|---|---|---|---|---|---|
| For Tube OD | Extra-Support Connection | Standard Connection | Wall Thick. | Material | For Tube Specifications Met | Each | |
| 1" | 1.995" | 1.984" | 0.065" | 316 Stainless Steel | ASTM A269, ASTM A270 | 0000000 | 000000 |
Quick-Clamp High-Vacuum Fittings for Stainless Steel Tubing
- For Use With:
Fittings with Gasket End: Air, Argon, Helium, Nitrogen
All Other Fittings: Air - Temperature Range: 0° to 300° F
- Tubing: Use with 304/304L or 316/316L stainless steel
- Specifications Met: ISO 2861
Instead of a gasket, these fittings have a special 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).
304 stainless steel 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).
For technical drawings and 3-D models, click on a part number.
Fittings with butt-weld end weld to tubing for a permanent connection. Fittings with butt-weld end are also known as ferrules.
Clamps tighten by hand. Spring-loaded clamps are also known as toggle clamps.
| For Tube OD | For Flange OD | For High-Vacuum Flange Size | High Vacuum Connection Type | Material | Max. Vacuum | Lanyard Length | Each | |
with Wing Nut | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1 1/2" | 2.16" | 40 | ISO-KF | Aluminum | 1 × 10 -7 torr @ 72° F | __ | 0000000 | 000000 |
| 2" | 2.95" | 50 | ISO-KF | Aluminum | 1 × 10 -7 torr @ 72° F | __ | 0000000 | 00000 |
Spring Loaded | ||||||||
| 1 1/2" | 2.16" | 40 | ISO-KF | Aluminum | 1 × 10 -7 torr @ 72° F | __ | 0000000 | 00000 |
| 2" | 2.95" | 50 | ISO-KF | Aluminum | 1 × 10 -7 torr @ 72° F | __ | 0000000 | 00000 |
Spring Loaded with Lanyard | ||||||||
| 1 1/2" | 2.16" | 40 | ISO-KF | Aluminum | 1 × 10 -7 torr @ 72° F | 5 3/4" | 00000000 | 00000 |
| 2" | 2.95" | 50 | ISO-KF | Aluminum | 1 × 10 -7 torr @ 72° F | 5 3/4" | 00000000 | 00000 |
Use these rings with quick-clamp high-vacuum fittings. They consist of a stainless steel inner ring covered by a fluoroelastomer O-ring.
| For Tube OD | For Flange OD | For High-Vacuum Flange Size | High Vacuum Connection Type | Inner Ring Material | Max. Vacuum | Max. Pressure | Each | |
Rings | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | Not Rated | 0000000 | 000000 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | Not Rated | 0000000 | 00000 |
Rings with Stainless Steel Screen | ||||||||
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | Not Rated | 00000000 | 00000 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | Not Rated | 00000000 | 00000 |
Rings with Aluminum Outer Ring | ||||||||
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 75 psi @ 72° F | 0000000 | 00000 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 50 psi @ 72° F | 0000000 | 00000 |
Hose absorbs moderate vibration
| For Tube OD | Flange OD | High-Vacuum Flange Size | High Vacuum Connection Type | Material | Max. Vacuum | Bend Radius | Flexibility | Each | |
4 3/16" Lg. | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | __ | Rigid | 0000000 | 0000000 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | __ | Rigid | 0000000 | 000000 |
12" Lg. | |||||||||
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 2 1/2" | Flexible | 00000000 | 000000 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 3 1/4" | Flexible | 00000000 | 000000 |
24" Lg. | |||||||||
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 2 1/2" | Flexible | 00000000 | 000000 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 3 1/4" | Flexible | 00000000 | 000000 |
39" Lg. | |||||||||
| 1 1/2" | 2.16" | 40 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 2 1/2" | Flexible | 00000000 | 000000 |
| 2" | 2.95" | 50 | ISO-KF | 304 Stainless Steel | 1 × 10 -7 torr @ 72° F | 3 1/4" | Flexible | 00000000 | 000000 |
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.
Nuts for Compression Fittings for Copper Tubing
Use these nuts with compression sleeves and fittings to create a strong seal on copper tubing. They are brass for good corrosion resistance.
Long nuts support more of the tube’s surface area than short nuts for a strong grip in high-vibration applications.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Cutting Oil, Fuel Oil, Hydraulic Fluid, Mineral Oil, Water
- Temperature Range: -65° to 250° F, except metric fittings are -40° to 200° F
- Tubing: Use with copper
- Specifications Met: UL listed, except for metric fittings
For Tube | ||||||
|---|---|---|---|---|---|---|
| OD | Wall Thick. | Nut Material | Max. Pressure | Lg. | Each | |
Long Nuts | ||||||
| 1/4" | 0.03" | Brass | 300 psi @ 72° F | 3/4" | 000000000 | 00000 |
Crimp-On Ferrules for Welding Hose
Use ferrules to create a permanent connection between your welding hose and barbed hose fittings. You will need a hose crimper (sold separately) for installation. Ferrules are brass for good corrosion resistance.
For technical drawings and 3-D models, click on a part number.
| Hose End ID | Lg. | Each | |
Brass | |||
|---|---|---|---|
| 0.564" | 3/4" | 000000000 | 00000 |