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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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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 1200° F
- Tubing: Use with seamless 304 or 316 stainless steel
- Specifications Met: See table
The threads on the tube end of these fittings are Class 3A or 3B 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 require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately.
304 stainless steel fittings have very good corrosion resistance.
Inline Tee Adapters, Tube × Male Threaded Pipe
Inline tees are also known as branch tees.
| For Tube OD | Pipe Size  | Max. Pressure | Specifications Met | Each | |
304 Stainless Steel | |||||
|---|---|---|---|---|---|
ANPT Threads | |||||
| 3/8" | 1/4 | 3,000 psi @ 72° F | ASTM A380, SAE AS4841, SAE AS9104/1, MS20825-6J, SAE AS9100D | 00000000 | 000000 |
Nuts
| For Tube OD | Max. Pressure | Specifications Met | Each | |
304 Stainless Steel | ||||
|---|---|---|---|---|
| 3/8" | 3,000 psi @ 72° F | AN818-6J, ASTM A380, SAE AS4841 | 0000000 | 00000 |
Sleeves
| For Tube OD | Max. Pressure | Specifications Met | Each | |
304 Stainless Steel | ||||
|---|---|---|---|---|
| 3/8" | 3,000 psi @ 72° F | AN819-6J, ASTM A380, MS20819, SAE AS4841, SAE AS5176 | 0000000 | 00000 |