cap screw: meaning, definition, pronunciation and examples
LowTechnical, Industrial
Quick answer
What does “cap screw” mean?
A screw with a large, flat head that sits flush with or above the surface when tightened.
Audio
Pronunciation
Definition
Meaning and Definition
A screw with a large, flat head that sits flush with or above the surface when tightened.
A specific type of machine screw used to fasten machine parts, typically requiring a wrench (e.g., hex key or socket) to turn its head.
Dialectal Variation
British vs American Usage
Differences
No significant lexical difference; the technical term is identical in both varieties.
Connotations
Purely technical/industrial. No cultural or social connotations.
Frequency
Equally low frequency in both regions, confined to mechanical/engineering contexts.
Grammar
How to Use “cap screw” in a Sentence
Use a [size] cap screw to fasten [component A] to [component B].The [socket/hex] head cap screw requires a [tool].Vocabulary
Collocations
Usage
Meaning in Context
Business
Rare; used only in procurement or manufacturing discussions.
Academic
Used in engineering, mechanical design, and materials science texts and lectures.
Everyday
Virtually never used outside of DIY or mechanical hobbies.
Technical
Standard term in mechanical engineering, manufacturing, assembly manuals, and hardware specifications.
Watch out
Common Mistakes When Using “cap screw”
- Using 'cap screw' to refer to any screw with a head (e.g., wood screw).
- Confusing it with a 'set screw' (which has no head).
- Using it as a verb (e.g., 'to cap screw' is incorrect).
FAQ
Frequently Asked Questions
In technical usage, bolts are generally meant to be used with a nut, while cap screws are threaded into a tapped hole. However, the terms are often used interchangeably in casual contexts.
Common tools include hex keys (Allen keys), socket wrenches, and spanner wrenches, depending on the head design (e.g., hex socket, hex head).
No, 'cap screw' is exclusively a noun. The action is 'to fasten with a cap screw' or 'to install a cap screw'.
They are primarily used to fasten metal components in machinery, engines, and structural frameworks, but also in plastics and composites in various assemblies.
A screw with a large, flat head that sits flush with or above the surface when tightened.
Cap screw is usually technical, industrial in register.
Cap screw: in British English it is pronounced /ˈkæp ˌskruː/, and in American English it is pronounced /ˈkæp ˌskruː/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Imagine a SCREW wearing a CAP (its head) that you need a special key (Allen key) to turn.
Conceptual Metaphor
A TOOTH FOR BITING INTO MATERIAL (the thread) WITH A HEAD FOR GRIPPING (the tool).
Practice
Quiz
What is a defining feature of a standard cap screw?