This Aluminum AN Pipe Nipple is used on aerospace hydraulic systems and features 1/4 in male NPT threads on both ends
            
        
            | Type | Aerospace Aluminum Hydraulic Fittings | 
| Style | AN Pipe Nipple | 
| Size | 1/4" | 
| Material | Aluminum | 
| Color | Blue | 
| Hex Size | 5/8" | 
| AN Specification | AN911-2D | 
| SAE Specification | AS4860D02 | 
| Series | AN911 |