box wrench
Noun: A type of hand tool, specifically a wrench, characterized by having a closed loop (called a socket) at one or both ends. This socket is designed to fit completely around and grip the flat sides of a nut or bolt head, allowing for the application of torque to tighten or loosen it.
The term "box wrench" refers specifically to the tool itself. It is used to describe the tool in a general sense or to specify the type of wrench needed for a task. - You'll need a box wrench to loosen that bolt; an open-end wrench might slip. - The mechanic selected a box wrench from his toolkit.
- "Box-end wrench": This is a common synonymous term. The "box end" refers to the closed-loop, socket-like end of the wrench.
- For better grip, always use the box-end side of a combination wrench first.
- Box-end wrench: A fully equivalent term.
- Socket wrench: A related but distinct tool where the socket is a separate, detachable piece that attaches to a handle or ratchet.
- Combination wrench: A single wrench that has a box-end on one side and an open-end on the other.
- Box-end wrench
A box wrench is distinguished from an open-end wrench, which has a U-shaped opening. The closed design of the box wrench provides greater contact with the fastener, reducing the risk of rounding the corners of the nut or bolt.
- a wrench with a closed loop (a socket) that fits over a nut or bolt head