6.4.2 Limited interchangeability Limited interchangeability applies only to 200 A loadbreak connectors and shall be demonstrated by compliance with all the requirements in 6.4.1, complete interchangeability, except for the switching (7.7) and fault close (7.8) test requirements. 6.4.3 Interface dimensions The dimensions of operating and bushing well interfaces shall be in accordance with Figure 3 through Figure 15. 6.4.4 Stacking dimensions Upon request, each manufacturer shall supply the dimensions in Figure 16, Figure 17, and Figure 18. The stacking, “S,” dimensions enable users to determine the dimensional effect of stacking components. The mounting, “M,” dimensions enable users to determine the depth that a bushing well or integral bushing projects into the apparatus on which it is mounted. A mounting, “M,” dimension is also provided for multiway junction brackets.