Thank you for your recent inquiry regarding this item from Prime-Line Products. Unfortunately there is not one lock that is standard to all doors, and there is no sure way to determine the correct replacement key cylinder without removing one and matching its dimensions to those listed online. Door manufacturers can often use more than one design within a given series or product line used over the years, making it sometimes difficult to provide an exact match when relying on manufacturer name and series alone. I would encourage you to consider these items also available from within this same site; GD-52139, U-10527, U-9965 & U-9966 to find the correct replacement cylinder your door requires.
For additional questions regarding this item, or any other product manufactured by Prime-Line Products, please call their toll free number at (877) 649-9740, or contact them by email at firstname.lastname@example.org