Definition

1. Noun:
   • A fastener made of metal with a helical ridge (thread): A "metal screw" is a type of fastener, typically with a pointed tip and a slotted or recessed head, designed to be rotated into a material to hold objects together or in place. Its defining characteristic is that it is constructed from metal, such as steel, brass, or aluminum.

Usage Examples

• Noun:
  • I need a metal screw to fix the hinge on this wooden door.
  • The assembly instructions specify using four-inch metal screws for the frame.
  • Over time, the old metal screw had rusted and was difficult to remove.

Advanced Usage

• Technical Specification: In engineering contexts, a "metal screw" is often specified by its material grade (e.g., stainless steel screw), thread type (e.g., machine screw), and drive type (e.g., Phillips head screw).
  • For this application, you must use a Grade 5 metal screw for sufficient tensile strength.

Variants and Related Words

• Machine Screw: A type of metal screw designed to be used with a nut or tapped hole, typically with a uniform diameter.
• Wood Screw: A metal screw with a tapered shank and coarse threads specifically for use in wood.
• Self-tapping Screw: A metal screw that can cut its own internal thread as it is driven into material.
• Screw (general): The broader category of fasteners, which can be made from various materials including plastic or wood.

Synonyms

• Bolt: While similar, a bolt is typically used with a nut and is not always tapered. In casual usage, "bolt" and "metal screw" are sometimes used interchangeably, though technically distinct.
• Fastener: A general term for any device used to hold objects together, which includes metal screws.

Related Phrases (Phrasal Verbs/Idioms)

• To screw in/on: The action of installing a screw by rotating it.
  • Make sure to screw in the metal screw tightly so the shelf is secure.
• To have a screw loose (idiom): To be slightly crazy or eccentric. (Note: This idiom uses "screw" metaphorically and does not specifically refer to a screw).
  • He thinks he can build a rocket in his garage; I think he might have a screw loose.

Noun

1. screw made of metal