pivot hinge (using extensions on the top and bottom of a door that fit into cavities in the frame)
sliding wooden bolt (for holding a door or window shut)
「枢」 has other readings with different meanings.
cavities in the frame of a door used as part of a pivot hinge
extensions on the top and bottom of a door that fit into cavities in the frame …
monkey (esp. the Japanese macaque, Macaca fuscata); ape; non-human primate