Definition

Noun: A pin wrench is a specialized hand tool designed to turn objects, typically nuts or fittings, that have holes or sockets on their outer surface. Its defining feature is a projecting pin (or pins) that fits into corresponding holes in the object, allowing torque to be applied without damaging the object's exterior.

Usage

A pin wrench is used when a standard wrench cannot grip the object effectively, often because the object lacks flat sides (e.g., a round collar or a locknut with holes). It provides a secure, non-slip grip for tightening or loosening.

Examples

• Noun:
  • To adjust the bearing preload, you will need a pin wrench to turn the locknut.
  • The plumber used a pin wrench to install the shower head without scratching its chrome finish.
  • This pin wrench has two adjustable pins to fit various sizes.

Advanced Usage

• "To fit the pin wrench": This describes aligning the tool's pin(s) with the object's holes.
  • Ensure the pins of the wrench fit snugly into the holes before applying force.

Variants and Related Words

• Pin spanner: A common synonym for a pin wrench, often used interchangeably.
• Hook wrench / Hook spanner: A similar tool that uses a hooked pin or claw to engage a notch, rather than a hole.
• Face spanner: A type of pin wrench designed to work on fittings where the pins engage holes on the face of the object.

Synonyms

• Pin spanner
• Spanner wrench (general category)

Notes

This is a specific type of wrench. The term refers to the tool itself, not the action of using it. The primary function is to transmit torque to objects designed with pin holes.

Noun

1. a wrench that has a projecting pin that fits into a socket on the object to be turned