lag bolt

Heavy-duty wood screw

A lag bolt is a heavy wood screw with a hexagonal head, driven with a wrench rather than a screwdriver.

Lag bolts are used for heavy-duty fastening—attaching lumber to lumber or hardware to wood framing: The deck ledger was secured with lag bolts.

Despite the name, they're technically screws, not bolts, since they thread into wood rather than accepting a nut.

Also called lag screw.

Related

wood · drill · drill bit · hex · socket · socket wrench · wrench · anchor · timber · pilot hole · stud finder · torque · fastener · ratchet · galvanized · deck · load bearing · joist

Categories
Opposites
fastener threading mechanism

lag boltmachine screw

Threaded fastener for pre-tapped holes

hex bolt · carriage bolt · set screw · sheet metal screw · threaded rod

fastening permanence

lag boltrivet

Headed pin hammered flat

weld · pop rivet · toggle bolt · wing nut · cotter pin

fastener size and application

lag boltfinish nail

Small fastener with minimal head

brad · tack · pin · staple · rivet

Family

lag, bolt, lags, lagged, lagging, lagger, bolts, bolted, bolting

Familiarity
Top 500,000
Profile
Used worldwide · Timeless · Concrete · Rated G