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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Vibration-Resistant Compression Fittings for Stainless Steel Tubing
- For Use With: Acetylene, Air, Butane, Compressed Air, Cutting Oil, Diesel Fuel, Fuel Oil, Gasoline, Helium, Hydraulic Fluid (Petroleum Base), Kerosene, Mineral Oil, Natural Gas, Nitrogen, Propane, Soap Solutions
- Temperature Range: -10° to 400° F
- Tubing: Use with seamless 316Ti or 321 stainless steel
- Specifications Met: DIN 3861
Instead of a metal sleeve (ferrule), these fittings have a rubber sleeve that cushions tubing and absorbs vibration to maintain a tight seal, even when connected to large pumps. However, rubber sleeves can’t withstand temperatures as high as metal ones. To create the strong seal, tighten the included nut. These fittings are made of 316 stainless steel, so they have excellent corrosion resistance. They’re also known as flareless fittings. All meet DIN 3861, which is an international standard for compression tube fitting specifications.
BSPP and metric male threads have a gasket to prevent leaks.
For technical drawings and 3-D models, click on a part number.
Male Threads with
Gasket and Washer
For Tube | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| OD, mm | Wall Thickness, mm | Pipe Size  | Thread Size | Thread Pitch, mm | Material | Gasket Material | Maximum Pressure | Each | |
NPT Threads | |||||||||
| 6 | 1 | 1/8 | __ | __ | 316 Stainless Steel | __ | 4,500 psi @ 72° F | 00000000 | 000000 |
| 6 | 1 | 1/4 | __ | __ | 316 Stainless Steel | __ | 4,500 psi @ 72° F | 00000000 | 00000 |
| 8 | 1 | 1/4 | __ | __ | 316 Stainless Steel | __ | 4,500 psi @ 72° F | 00000000 | 00000 |
| 10 | 1 | 1/4 | __ | __ | 316 Stainless Steel | __ | 4,500 psi @ 72° F | 00000000 | 000000 |
| 10 | 1 | 3/8 | __ | __ | 316 Stainless Steel | __ | 4,500 psi @ 72° F | 00000000 | 000000 |
| 12 | 1.5 | 1/4 | __ | __ | 316 Stainless Steel | __ | 4,500 psi @ 72° F | 00000000 | 000000 |
| 12 | 1.5 | 1/2 | __ | __ | 316 Stainless Steel | __ | 4,500 psi @ 72° F | 00000000 | 000000 |
| 15 | 1.5 | 1/2 | __ | __ | 316 Stainless Steel | __ | 4,500 psi @ 72° F | 00000000 | 000000 |
| 18 | 2 | 1/2 | __ | __ | 316 Stainless Steel | __ | 4,500 psi @ 72° F | 00000000 | 000000 |
BSPP Threads | |||||||||
| 6 | 1 | 1/8 | __ | __ | 316 Stainless Steel | Fluoroelastomer Rubber | 4,500 psi @ 72° F | 00000000 | 00000 |
| 6 | 1 | 1/4 | __ | __ | 316 Stainless Steel | Fluoroelastomer Rubber | 4,500 psi @ 72° F | 00000000 | 00000 |
Metric Threads | |||||||||
| 8 | 1 | __ | M12 | 1.5 | 316 Stainless Steel | Fluoroelastomer Rubber | 4,500 psi @ 72° F | 00000000 | 000000 |
| 10 | 1 | __ | M14 | 1.5 | 316 Stainless Steel | Fluoroelastomer Rubber | 4,500 psi @ 72° F | 00000000 | 00000 |
For Tube | |||||
|---|---|---|---|---|---|
| OD, mm | Wall Thickness, mm | Nut Material | Maximum Pressure | Each | |
| 6 | 1 | 316 Stainless Steel | 4,500 psi @ 72° F | 00000000 | 000000 |
| 8 | 1 | 316 Stainless Steel | 4,500 psi @ 72° F | 00000000 | 00000 |
| 10 | 1 | 316 Stainless Steel | 4,500 psi @ 72° F | 00000000 | 00000 |
| 12 | 1.5 | 316 Stainless Steel | 4,500 psi @ 72° F | 00000000 | 00000 |
| 15 | 1.5 | 316 Stainless Steel | 4,500 psi @ 72° F | 00000000 | 00000 |
| 18 | 2 | 316 Stainless Steel | 4,500 psi @ 72° F | 00000000 | 00000 |
Couplers for High-Pressure Fill Valves
Fill tanks and recharge struts—these couplers join hose to high-pressure fill valves with Schrader threads.
Some couplers meet SAE AS4395, an automotive industry standard for flared fitting dimensions.
70° elbow couplers are angled to access hard-to-reach valves.
Couplers with a shut-off valve let you control the flow of air by hand. When used with Schrader valves that have a core, the core depressor pin in these couplers press valves open to let air flow in.
For technical drawings and 3-D models, click on a part number.
Female Threaded Hose ×
NPT Female Threaded Pipe
Threaded Hose × NPT
Threaded Male Pipe
Female Threaded Hose ×
UN/UNF Male Flared Tube
Female Threaded Hose ×
UN/UNF Male Flared Tube
Female Threaded Hose ×
UN/UNF Male Flared Tube
Inlet | Outlet | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Material | Thread Size | Material | Flared Angle | For Tube OD | Material | Max. Pressure, psi | Temp. Range, °F | Features | Specifications Met | Each | |
Straight | ||||||||||||
| 0.305"-32 | Zinc-Plated Steel | 7/16"-20 | Stainless Steel | 37° | 1/4" | __ | 5,000 | -20° to 250° | __ | SAE AS4395 | 000000 | 000000 |
70° Elbow | ||||||||||||
| 0.305"-32 | __ | 7/16"-20 | __ | 37° | 1/4" | Brass | 5,000 | Not Rated | __ | __ | 000000 | 00000 |
90° Elbow with a Shut-Off Valve | ||||||||||||
| 0.305"-32 | __ | 3/8"-24 | __ | 37° | 3/16" | Brass | 3,000 | -40° to 160° | Core Depressor Pin | SAE AS4395 | 000000 | 00000 |
| 0.485"-26 | __ | 3/8"-24 | __ | 37° | 3/16" | Brass | 3,000 | -40° to 160° | Core Depressor Pin | __ | 000000 | 00000 |
Air Chucks
Attach these chucks to your air hose so you can connect the hose to Schrader valves. Most often recognized from car and bike tires, Schrader valves are also commonly found on compressed air tanks and high-pressure hydraulic systems.
Chucks with a clip-on Schrader connection attach to the valve stem, so you don’t need to hold them as the valve fills.
Chucks with a sleeve-lock Schrader connection grab onto the valve by sliding the sleeve forward onto the valve. To disconnect, slide the sleeve back and pull out the valve.
Chucks with a threaded Schrader connection screw onto valves for a secure connection that you don’t need to hold in place.
Inlet | Outlet | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Thread Size | For Thread Type | Gender | Connection Style | Connection Type | Barbed Connection Type | Pipe Size | Thread Type | For Tube ID | Gender | Max. Pressure, psi | Material | Each | ||
| A | 0.305"-32 | Schrader | Female | Threaded | Pipe | __ | 1/4 | NPT | __ | Female | 150 | Metal | 0000000 | 00000 |
| B | 0.305"-32 | Schrader | Female | Threaded | Pipe | __ | 1/4 | NPT | __ | Female | 150 | Metal | 0000000 | 00000 |
| C | 0.305"-32 | Schrader | Female | Threaded | Pipe | __ | 1/4 | NPT | __ | Female | 150 | Metal | 0000000 | 00000 |
| D | 0.305"-32 | Schrader | Female | Barbed | Tube | Barbed | __ | __ | 1/4" | Male | 150 | Metal | 0000000 | 0000 |
| D | 0.305"-32 | Schrader | Female | Barbed | Tube | Barbed | __ | __ | 3/8" | Male | 150 | Metal | 0000000 | 0000 |
Inlet | Outlet | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Thread Size | For Thread Type | Gender | Connection Style | Connection Type | Barbed Connection Type | Pipe Size | Thread Type | For Tube ID | Gender | Max. Pressure, psi | Material | Each | ||
| E | 0.305"-32 | Schrader | Female | Threaded | Pipe | __ | 1/4 | NPT | __ | Female | 150 | Metal | 0000000 | 000000 |
| F | 0.305"-32 | Schrader | Female | Barbed | Tube | Barbed | __ | __ | 1/4" | Male | 150 | Metal | 0000000 | 00000 |
Inlet | Outlet | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Thread Size | For Thread Type | Gender | Connection Style | Connection Type | Pipe Size | Thread Type | Gender | Max. Pressure, psi | Material | Each | ||
| G | 0.305"-32 | Schrader | Female | Threaded | Pipe | 1/4 | NPT | Female | 120 | Metal | 000000 | 000000 |
Inlet | Outlet | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Thread Type | Gender | Connection Style | Connection Type | Barbed Connection Type | For Tube ID | Gender | Max. Pressure, psi | Material | Each | ||
| H | 0.305"-32 | Schrader | Female | Barbed | Tube | Barbed | 7/32" | Male | 120 | Metal | 000000 | 00000 |