How to Identify and Measure Fittings
Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.
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Metal Barbed Hose Fittings for Air and Water
Slide the barbed end into rubber hose and secure with the appropriate clamp or crimp-on hose ferrule.
Zinc-plated steel fittings are stronger and more durable than other metal fittings. They have fair corrosion resistance, so they should be used primarily in dry environments.
Fittings with a threaded end are also known as hose nipples.
For technical drawings and 3-D models, click on a part number.
- Maximum Pressure: See table
- Maximum Vacuum: See table
- Temperature Range: See table
- Attachment Type: See table
- Specifications Met: See table
Metal Push-On Barbed Hose Fittings for Air and Water
Fittings have sharper barbs than standard barbed hose fittings to grip rubber push-on hose with no clamps or ferrules required. The more you pull on the fittings, the tighter the hose will grip.
Brass fittings are softer than other metal fittings, so they’re easier to thread together. They have good corrosion resistance.
Fittings with a flared end meet JIC or SAE standards for dimensions. Fittings with a female 37° and 45° flared end have a dual-angle seat that accepts both 37° and 45° flared fittings.
The optional installation tool (sold separately) allows you to connect large quantities of barbed fittings to push-on hose. Use the built-in cutter to squarely cut the hose without fraying. Next, lubricate either the push-on hose, fitting or both. Then, clamp the hose into the tool’s vise and apply light pressure on the handle to drive into the fitting.
Note: To ensure proper connection, the barbed end has to be pushed in all the way, with the hose end concealed by the ring.
For technical drawings and 3-D models, click on a part number.
- Maximum Pressure: 300 psi @ 72° F
- Temperature Range: -20° to 150° F
- Specifications Met: SAE J512, SAE J514
Mounting Hole | ||||||||
|---|---|---|---|---|---|---|---|---|
| For Hose ID Range | Lg. | Ht. | Dp. | Dia. | No. of | Mounting Fasteners Included | Each | |
| 1/4" to 3/4" | 13 1/2" | 7" | 2 3/8" | 5/8" | 4 | No | 00000000 | 0000000 |
Vibration-Resistant Precision AN 37° Flared Fittings for Stainless Steel Tubing
- For Use With: Air, Cutting Oil, Fuel Oil, Hydraulic Fluid, Mineral Oil, Water
- Temperature Range: -320° to 500° F
- Tubing: Use with seamless 304 or 316 stainless steel
- Specifications Met: See Table
A PTFE seal on the tube end of these fittings allows for an extra-strong connection in high-vibration applications. The threads on the tube end are Class 3A and adhere to tighter tolerances than other 37° flared fittings. They are made to exact AS (formerly AN) specifications and provide a tight metal-to-metal seal on tubing that is flared to 37°. Fittings are 316 stainless steel for excellent corrosion resistance. They require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately.
For technical drawings and 3-D models, click on a part number.
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.
| For Tube OD | Material | Max. Pressure | Specifications Met | For Hole Dia. | For Max. Wall Thick. | Each | |
| 1/2" | 316 Stainless Steel | 3,000 psi @ 72° F | AN832-8K, ASTM A380, SAE AS9100D, SAE AS9104/1 | 3/4" | 1/8" | 00000000 | 000000 |
| For Tube OD | Nut Material | Max. Pressure | Specifications Met | Each | |
| 1/2" | 316 Stainless Steel | 3,000 psi @ 72° F | AN818-8K, ASTM A380, SAE AS4841 | 00000000 | 000000 |
| For Tube OD | Sleeve Material | Max. Pressure | Specifications Met | Each | |
| 1/2" | 316 Stainless Steel | 3,000 psi @ 72° F | AN819-8K, ASTM A380, MS20819, SAE AS4841 | 00000000 | 000000 |
Yor-Lok Fittings for Stainless Steel Tubing
A nut with two sleeves (ferrules) gives these fittings extra gripping power. The sleeves bite into tubing as you tighten the nut, creating a strong seal. Also known as instrumentation fittings, they are made to tight tolerances for use in high-precision applications. They are compatible with Swagelok®, Let-Lok, and A-Lok fittings.
316 stainless steel fittings have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Cutting Oil, Fuel Oil, Gasoline, Hydraulic Fluid, Mineral Oil, Steam, Water
- Tubing: Use with welded or seamless 304/304L or 316/316L stainless steel that meets ASTM A213, ASTM A249, or ASTM A269
Fittings with standard barbed hose end connect to hose with a hose clamp (sold separately).
For Tube | |||||||
|---|---|---|---|---|---|---|---|
| OD, mm | Wall Thick., mm | For Hose ID | Material | Max. Pressure | Temp. Range, °F | Each | |
| 10 | 0.5 to 2 | 1/2" | 316 Stainless Steel | 300 psi @ 72° F | -40° to 200° | 00000000 | 000000 |
- For Use With: Air, Cutting Oil, Fuel Oil, Gasoline, Hydraulic Fluid, Mineral Oil, Water
- Tubing: Use with welded or seamless 304/304L or 316/316L stainless steel that meets ASTM A213, ASTM A249, or ASTM A269
Fittings with push-on barbed hose end have sharper barbs than standard barbed hose fittings to grip reinforced rubber push-on hose with no clamps required. The more you pull on the fittings, the tighter the hose will grip.
For Tube | |||||||
|---|---|---|---|---|---|---|---|
| OD | Wall Thick. | For Hose ID | Material | Max. Pressure | Temp. Range, °F | Each | |
| 1/2" | 0.035" | 1/2" | 316 Stainless Steel | 300 psi @ 72° F | -40° to 200° | 00000000 | 000000 |
- For Use With: Air, Cutting Oil, Fuel Oil, Gasoline, Hydraulic Fluid, Mineral Oil, Water
- Tubing: Use with welded or seamless 304/304L or 316/316L stainless steel that meets ASTM A213, ASTM A249, or ASTM A269
Fittings with tube stem insert into the tube end of another fitting in place of a length of tubing.
Fittings with push-on barbed hose end have sharper barbs than standard barbed hose fittings to grip reinforced rubber push-on hose with no clamps required. The more you pull on the fittings, the tighter the hose will grip.
| Tube Stem OD | For Hose ID | Material | Max. Pressure | Temp. Range, °F | Each | |
| 1/2" | 1/2" | 316 Stainless Steel | 300 psi @ 72° F | -40° to 200° | 00000000 | 000000 |
- For Use With: Air, Cutting Oil, Fuel Oil, Gasoline, Hydraulic Fluid, Mineral Oil, Natural Gas, Steam, Water
- Tubing: Use with welded or seamless 304/304L or 316/316L stainless steel that meets ASTM A213, ASTM A249, or ASTM A269
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.
For Tube | ||||||||
|---|---|---|---|---|---|---|---|---|
| OD | Wall Thick. | Material | Max. Pressure | Temp. Range, °F | For Hole Dia. | For Max. Wall Thick. | Each | |
| 3/8" | 0.035" | 316 Stainless Steel | 2,500 psi @ 72° F | -420° to 1200° | 5/8" | 9/16" | 00000000 | 000000 |
Ultra-High-Vacuum Flanges and Fittings for Stainless Steel Tubing
- For Use With: Air
- Temperature Range:
Flanges: -300° to 800° F
Gaskets: Not Rated - Tubing: Use with 304/304L and 316/316L stainless steel
- Specifications Met:
Flanges: ASTM A240, ASTM E45, ASTM E12
Gaskets: ASTM B152-179, ASTM F68
Create access points in ultra-high-vacuum lines or chambers by bolting two same-size flanges together with a copper gasket (sold separately) between them. The flanges’ sharp edges dig into the copper gasket and form an extremely tight seal, which means they handle higher vacuum pressures than other high-vacuum fittings with rubber gaskets. Also known as CF, Conflat, and UHV fittings, use them in vacuum coating, heat treating, and drying applications, as well as for leak testing and analyzing gases. They’re stainless steel so they resist rusting.
Butt-weld flanges provide a flush connection for smooth flow through your line.
Bolt kits are required to make a complete connection.
For technical drawings and 3-D models, click on a part number.
Butt-Weld Tube Connection | Flanged Tube Connection | Bolt Hole | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | Wall Thick. | For Tube OD | Flange OD | High-Vacuum Flange Size | High Vacuum Connection Type | Bolt Circle Dia. | Dia. | No. of | Bolts Included | No. of Bolt Kits Required | Lg. | Max. Vacuum | Material | Appearance | Each | |
Fixed | ||||||||||||||||
| 1 1/2" | 0.065" | 1 1/2" | 2 3/4" | 40 | CF | 2 5/16" | 17/64" | 6 | No | 1 | 2 15/32" | 1 × 10 -13 torr @72° F | 304 Stainless Steel | Polished | 0000000 | 000000 |
| For Tube OD | For Flange OD | Gasket Material | Specifications Met | Each | |
| 1 1/2" | 2 3/4" | Copper | ASTM F68 | 0000000 | 00000 |
| For Flange OD | For High-Vacuum Flange Size | Bolt Dia. | Thread Size | No. of Bolts Included | No. of Nuts Included | No. of Washers Included | Bolt Material | Each | |
| 2 3/4" | 40 | 1/4" | 1/4"-28 | 6 | 6 | 12 | 18-8 Stainless Steel | 0000000 | 000000 |