Sonar Carbon Fuselage Screw Pack B2 2024Description Titanium countersunk screws to attach your Sonar Carbon Fuselage to your Sonar Mast. The Sonar Carbon Fuselage Screw Pack B2 (M8x30 TH CSK T40) is designed to fit Sonar Carbon Fuselage with tapered countersink holes. How to identify the correct screws for your carbon fuselage: More recent models of the Sonar Carbon Fuselage will have tapered countersink holes. These allow the head of a flathead screw to sit flush with the top of the