bolt head
Wrench grips here
A bolt head is the enlarged top portion of a bolt—the part you grip with a wrench or socket to tighten or loosen it.
Bolt heads come in various shapes: hexagonal heads are most common, but square, round, and specialized forms exist for different applications.
The head prevents the bolt from passing entirely through the material being fastened.
- hexMalevolent incantation
- hex keySix-sided fastener driver
- socketHollow receiving cavity
- wrenchTool for turning fasteners
- torque wrenchCalibrated tightening instrument
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