This is a simple latch lock you may use on a cupboard door - outside storage box - All parts are printed - Screws or self taping screws will be required to mount the lock to the door and frame - The print is my interpretation of a cold room door and latch mechanism.

Spring and pins printed in PETG - Printed 0.16mm layer height with 15% infill Increased the top layers to 3

Lock and latch with lock mechanism printed with PLA - Printed with 50% infill 
Will be adding a pad lock version of this lock soon