Product Code:SAE AS39901 Title:Bearings, Roller, Needle, Airframe, Antifriction, Inch Issuing Committee:Acbg Rolling Element Bearing Committee Scope: This standard covers the requirements for non-separable, Airframe Anti-friction Needle Bearings, intended for use in flight vehicle control systems, with radial loads. Rationale: This standard covers the requirements for non-separable, Airframe Anti-friction Needle Bearings, intended for use in flight vehicle control systems, with radial loads.