Key, lock, and latch assembly

A system, comprising:

• a lock apparatus including:
• a block formed to include a first bore extending into the block and a pin-receiving slot extending into the block to intersect with the first bore;
• a lock member adapted to be received in the first bore of the block and move relative to the block, the lock member including a first end and a second end spaced apart from the first end, the lock member formed to include an annular groove, an axial slot extending toward the first end of the lock member from the annular groove, and a second bore extending from the second end toward the first end;
• a cross-pin positioned within the pin-receiving slot of the block and adapted to slide in the annular groove and axial slot of the lock member to control movement of the lock member relative to the block;
• a coupler shaft positioned within the second bore and coupled with the lock member to move therewith;
• and
• a tumbler arrangement coupled between the lock member and the block and adapted to control movement of the lock member relative to the block;
• and
• a key including:
• a head;
• a key shaft coupled to the head and extending from the head along a longitudinal axis, the key shaft being hollow to define a cavity therein;
• and
• a protrusion extending outward from the key shaft,
• wherein a leading end of the key shaft is formed to define a plurality of mating portions extending into an exterior of the key shaft and corresponding to a plurality of tumbler pins of the tumbler arrangement in the lock apparatus, the key shaft is configured to extend into the second bore of the lock member and receive the coupler shaft in the cavity to engage the mating portions with the tumbler arrangement to allow movement of the lock apparatus between locked and unlocked positions with the cross-pin arranged in the annular groove and out of the axial slot, and the protrusion is axially spaced apart from the mating portions and configured to trap the key shaft in the lock member when the lock apparatus is in the unlocked position.