Tube Elbow, 3​/​8 in Connection, 37 deg Flared Tube Connection, 9​/​16-18 TECHNICAL INFORMATION • Aeronautical Standard • FAA-STD Approved SPECIFICATIONS • Connection Size: 3​/​8 in • Connection Type: 37 deg Flared Tube • Thread Size: 9​/​16-18 • Thread Type: UNJF • Thread Class: 3A • Angle: 90 deg • Material: Aluminum Alloy • Finish: Anodized • Domestic​/​Import: Domestic