This 1/4 in Aluminum 37° Flare Tube Nut is used with AN819 tube sleeve on aerospace hydraulic systems to protect the tubing and to attach female fittings
| Type | Aerospace Aluminum Hydraulic Fittings |
| Style | 37° Flare Tube Nut |
| Size | 7/16" - 20 |
| Material | Aluminum |
| Tube O.D. | 1/4" |
| Color | Blue |
| Series | AN818 |
| Hex Size | 9/16" |
| AN Specification | AN818-4D |
| SAE Specification | AS5175D4 |
