extension bolt
Low/TechnicalTechnical/Industrial
Definition
Meaning
A threaded bolt used to extend the length of a threaded rod, shaft, or another bolt, typically by screwing onto it.
A fastener that provides a secure, threaded connection to lengthen an assembly, often used in construction, machinery, and furniture where a standard bolt is too short.
Linguistics
Semantic Notes
Specifically denotes a type of connector, not a standalone bolt. The primary function is lengthening, not just fastening.
Dialectal Variation
British vs American Usage
Differences
No significant lexical difference. The component is known by the same name in both engineering contexts.
Connotations
Neutral technical term in both regions.
Frequency
Equally low-frequency and specialised in both UK and US engineering/construction jargon.
Vocabulary
Collocations
Grammar
Valency Patterns
Use an extension bolt to connect [NOUN] to [NOUN].The [NOUN] requires an extension bolt for [NOUN].Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None”
Usage
Context Usage
Business
Rare, except in procurement or technical sales for hardware.
Academic
Found in engineering textbooks or papers on mechanical design.
Everyday
Virtually never used outside of DIY or construction contexts.
Technical
Core term in mechanical engineering, construction, and assembly manuals.
Examples
By Part of Speech
verb
British English
- We need to extension-bolt the two sections together. (Very rare/technical)
American English
- The design calls for extension-bolting the support rod. (Very rare/technical)
adverb
British English
- The rod was attached extension-bolt tight. (Rare/Non-standard)
American English
- The assembly was fixed extension-bolt securely. (Rare/Non-standard)
adjective
British English
- The extension-bolt fitting is corroded.
American English
- Check the extension-bolt connection for tightness.
Examples
By CEFR Level
- The shelf fell because the bolt was too short; we need an extension bolt.
- To secure the heavy fixture to the deep masonry, the installer used a steel extension bolt.
- The mechanical drawing specifies an M12 extension bolt to couple the threaded rod to the actuator, ensuring sufficient travel length.
Learning
Memory Aids
Mnemonic
Think of a telescope: an 'extension bolt' extends the 'reach' of a bolt, just as a telescope extends your sight.
Conceptual Metaphor
LENGHTENING IS CONNECTING; A TOOL FOR BRIDGING A GAP.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid literal translation as 'удлинительный болт'. Use 'удлинительная шпилька', 'соединительная гайка-муфта', or 'наращивающий болт' depending on the exact mechanism.
- Do not confuse with 'анкерный болт' (anchor bolt), which serves a different purpose.
Common Mistakes
- Using 'extension bolt' to refer to any long bolt.
- Confusing it with a 'hanger bolt' (which has wood and machine threads).
Practice
Quiz
What is the primary function of an extension bolt?
FAQ
Frequently Asked Questions
They serve a similar connecting purpose, but a coupling nut is typically a hexagonal nut used internally, while an extension bolt often has a bolt head on one end for turning.
Only if it is specifically rated for such load-bearing applications. Always consult engineering specifications for safety.
Commonly steel (often galvanised or stainless), brass, or other metals, depending on required strength and corrosion resistance.
Match the thread pitch and diameter (e.g., M8, 1/4") to the existing rod or bolt, and select a length that achieves your desired total extension.