Bolts
Types of Bolts
Hex Bolt
hex head cap screw · hex cap screw
A hex bolt is an externally threaded fastener with a six-sided head, designed to pass through unthreaded holes…
Carriage Bolt
coach bolt · round head square neck bolt
A carriage bolt has a smooth domed head and a square shoulder under the head that bites into wood, letting it …
Lag Bolt
lag screw · coach screw
A lag bolt (lag screw) is a heavy-duty fastener with coarse wood threads and a hex head, driven directly into …
Socket Head Cap Screw
SHCS · Allen bolt
A socket head cap screw has a cylindrical head with a hexagonal socket drive (Allen key). It offers high stren…
Shoulder Bolt
shoulder screw · stripper bolt
A shoulder bolt has a precision-ground, unthreaded shoulder of larger diameter than the thread, so it can act …
Eye Bolt
eye screw · forged eye bolt
An eye bolt is a bolt with a closed loop (eye) at one end for attaching ropes, cables, or hooks — used for rig…
U-Bolt
pipe clamp bolt · round bend u-bolt
A U-bolt is a U-shaped bolt with threads on both legs, used to clamp a pipe, tube, or bundle to a flat surface…
Flange Bolt
flange head bolt · frame bolt
A flange bolt is a hex bolt with an integrated washer-like flange under the head that spreads load and resists…
Structural Bolt
ASTM A325 bolt · A490 bolt
A structural bolt is a high-strength, heavy hex bolt manufactured to ASTM A325 or A490, used in steel-to-steel…
Stud Bolt
stud bolt · continuous thread stud
A stud bolt is a headless, fully threaded fastener used with two nuts to join flanged connections, most often …
J-Bolt
j hook bolt · hook anchor bolt
A J-bolt is a rod threaded on one end and bent into a J-hook on the other, cast into concrete to anchor sills,…
T-Bolt
t-slot bolt · hammer head bolt
A T-bolt has a rectangular head that drops into a T-slot in aluminum extrusion, where it is turned and tighten…
Anchor Bolt
foundation bolt · cast-in-place bolt
An anchor bolt is a headed, L-shaped, or straight rod cast into concrete to connect structural steel or equipm…
Elevator Bolt
belt bolt · flat head square neck bolt
An elevator bolt has a large, thin, flat head and a square neck — used to fasten conveyor belts and bucket ele…
Stove Bolt
slotted round head bolt · stove screw
A stove bolt is a small machine-screw-sized bolt with a slotted round, flat, or truss head, traditionally used…
Plow Bolt
plough bolt · countersunk square neck bolt
A plow bolt has a flat, countersunk head and a square neck, designed to sit flush while the square neck bites …
Square Head Bolt
square bolt · square head machine bolt
A square head bolt has a four-sided head driven by an open-end wrench — the classic pre-1900 bolt still used o…
Step Bolt
ladder bolt · round head square neck bolt
A step bolt has a large round head and a square neck, used to bolt ladder rungs and steps to rails — the squar…
Timber Bolt
mushroom head bolt · dome head bolt
A timber bolt has a large low-dome (mushroom) head and a square or ribbed neck, made for heavy timber connecti…
Track Bolt
rail bolt · railroad bolt
A track bolt has an oval (elliptical) neck that locks into the rail and a dome head, used to fasten railroad r…