9.3.3
Before balancing, mounting surfaces (e.g. bores) shall be aligned so that the component's geometric center is concentric with center of rotation for balancing within 0.00004 in./in. of mounting diameter or 0.00025 in., whichever is greater. (values can be doubled if using runout instead of concentricity)
9.3.4
Each bolt, each nut and other similar components (e.g., cap screws, washers, etc.) that require removal for normal field disassembly, shall be mass balanced individually to within 0.05% of the component's mass or 0.1 gram, whichever is greater.