noun
bent nail; crooked nail
A nail that has been bent, often accidentally or for reuse. Not a specialized hardware term.
折れ釘を金槌で叩いてまっすぐにした。
I hammered the bent nail straight.
noun
L-shaped hook; square bend screw hook
A nail or screw with a right-angle bend, used as a hook for hanging items. Often called an 'L hook' in hardware contexts.
壁に折れ釘を打って、カレンダーを掛けた。
I drove an L-shaped hook into the wall and hung a calendar.