carriage bolt
Square-necked hardware bolt
A carriage bolt is a bolt with a smooth, rounded head and a square section just below it.
When driven into a hole, the square neck grips the wood and prevents the bolt from spinning as the nut is tightened: The fence rails were secured with carriage bolts.
The domed head sits flush and leaves no slot for tampering.
Hard-shelled seed
- washerSpacer ring for fasteners
- shankLower leg segment
- domedWith rounded roof
- anchorSecures ships to seabed
rivet · pin · clevis · machine screw · flange · countersink · pilot hole
Hole-boring device
- wrenchTool for turning fasteners
- socketHollow receiving cavity
- spannerTool for turning nuts
- tightenMake more secure
loosen · torque · clamp · brace · ratchet · hex key · screwdriver · tap
nut
Hard-shelled seed
anchor · rivet · pin · clevis · machine screw · flange · countersink · pilot hole
drill
Hole-boring device
tighten · loosen · torque · clamp · brace · ratchet · hex key · screwdriver · tap · die
woodwork
Craft of building with lumber
playground equipment · furniture · fencing · pergola · timber framing · bleachers · guardrail · swing set · carport · gazebo
pitch
Frequency of sound
coarse thread · fine thread · UNC · metric · shank · lead · spiral · engaged