Allen wrench
English
![](Images/wiktionary/Allen_wrench_and_screw_(PSF).png.webp)
Etymology
Allen, the name of Allen Manufacturing Company, and wrench.
Noun
Allen wrench (plural Allen wrenches)
- A hex head wrench.
Synonyms
- (hex head wrench): Allen key, hex head wrench, hex key
Related terms
- Allen screw
- Allen bolt