Allen screws
Hexagonal socket bolts
Allen screws are fasteners with hexagonal sockets in their heads, driven by L-shaped hex keys called Allen wrenches or Allen keys.
Common in furniture assembly, bicycles, and machinery where a flush or recessed head is desirable: The instructions said to tighten the Allen screws with the included wrench.
- boltsThreaded metal fasteners
- wrenchesTools for turning fasteners
- hex keySix-sided fastener driver
- fasteningJoining two parts together
- hand toolsUnpowered grip-operated devices
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