boulon

bolt

noun boo-LOHN Rare

Usage Note

Boulon refers to a threaded bolt (the fastener that pairs with an écrou, a nut). It is standard workshop and mechanics vocabulary. The related verb is boulonner ('to bolt down'). Unlike vis (a screw), a boulon requires a nut on the other end and is used for heavier assemblies.

Examples

"Il manque un boulon sur cette roue."

Natural Translation

A bolt is missing from this wheel.

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