allen screw: meaning, definition, pronunciation and examples
LowTechnical
Quick answer
What does “allen screw” mean?
A screw with a hexagonal socket in its head, designed to be turned with an Allen key (hex key).
Audio
Pronunciation
Definition
Meaning and Definition
A screw with a hexagonal socket in its head, designed to be turned with an Allen key (hex key).
A type of fastener known for its resistance to cam-out (slipping) and its ability to be used in confined spaces where a protruding screw head is not desirable. Commonly used in machinery, bicycles, furniture assembly, and electronics.
Dialectal Variation
British vs American Usage
Differences
The term is used identically in both varieties. The tool is called an 'Allen key' in the UK and often an 'Allen wrench' or 'hex key' in the US.
Connotations
None. Purely technical/descriptive.
Frequency
Equally low-frequency in both dialects, confined to technical, mechanical, and DIY contexts.
Grammar
How to Use “allen screw” in a Sentence
[Subject] tightened/loosened the allen screw with [Tool].The [Component] is fastened by/with an allen screw.Vocabulary
Collocations
Examples
Examples of “allen screw” in a Sentence
verb
British English
- You'll need to allen-screw the bracket to the frame.
- The plate is allen-screwed into place.
American English
- Allen-screw the handle onto the shaft.
- The cover was allen-screwed shut.
adjective
British English
- It's an allen-screw fitting.
- The allen-screw connection is more secure.
American English
- Use an allen-screw driver for this.
- The allen-screw fastener is stripped.
Usage
Meaning in Context
Business
Rare, except in procurement, manufacturing, or engineering supply contexts.
Academic
Used in engineering, product design, and materials science texts.
Everyday
Used in DIY, furniture assembly, and bicycle maintenance contexts.
Technical
The primary register. Standard term in mechanical engineering, machining, and assembly manuals.
Vocabulary
Synonyms of “allen screw”
Strong
Neutral
Weak
Vocabulary
Antonyms of “allen screw”
Watch out
Common Mistakes When Using “allen screw”
- Misspelling as 'Alan screw' or 'Allen's screw'.
- Using it as a general term for any small screw.
- Confusing it with a 'set screw' (which it often is, but not exclusively).
FAQ
Frequently Asked Questions
Yes, originally a trademark of the Allen Manufacturing Company, but it is now a genericized trademark for any screw with a hexagonal socket drive.
An 'Allen screw' specifically refers to the drive type (internal hex). A 'hex bolt' typically has a hexagonal head on the outside, designed for a spanner or socket, not an Allen key.
No. An Allen screw requires a corresponding hexagonal key (Allen key/wrench) or a hex bit for a screwdriver or drill.
They allow for a neat, flush finish as the screw head can be sunk into a counterbore. The internal hex drive also reduces the chance of damaging the visible surface during assembly.
A screw with a hexagonal socket in its head, designed to be turned with an Allen key (hex key).
Allen screw is usually technical in register.
Allen screw: in British English it is pronounced /ˈælən skruː/, and in American English it is pronounced /ˈælən skruː/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “No common idioms.”
Learning
Memory Aids
Mnemonic
Think 'Allen' has ALL the sides INSIDE (a hexagonal socket inside the screw head).
Conceptual Metaphor
TOOLS ARE LIMBS (The Allen key becomes an extension of the hand to apply torque).
Practice
Quiz
What is the defining feature of an Allen screw?