Hex, Socket, Structural & Specialty Bolts
Bolts are the core product of the Yongnian fastener cluster. From commodity DIN 933 hex bolts and DIN 912 socket head cap screws to high-strength ASTM A325 structural bolts, specialized factories produce the full international range. HDBolt sources from the factory most appropriate to each grade, size, and application.
Sub-categories
Hex Bolt, Full Thread
A fully threaded hex bolt has threads running the entire length of the shank from head to tip. DIN 933 (with metric coar...
Hex Bolt, Partial Thread
A partially threaded hex bolt has a smooth (unthreaded) shank under the head, with threads only on the lower portion. DI...
Socket Head Cap Screw / Allen Bolt
Socket head cap screws, commonly called Allen bolts, use a deep internal hex drive in a cylindrical head. Their compact ...
Button Head Socket Screw
Button head socket screws combine a low rounded profile with an internal hex drive. They are selected when appearance, s...
Countersunk Socket Screw
Countersunk socket screws use a 90-degree flat head that seats flush with the surrounding surface. The internal hex driv...
Low Head Socket Cap Screw
DIN 7984 low head socket cap screws have a cylindrical head substantially shorter than DIN 912. They fit machinery, slid...
Socket Shoulder Screw / Shoulder Bolt
Socket shoulder screws, also called shoulder bolts or stripper bolts, combine a precision smooth shoulder with a smaller...
Hex Cap Screw / Tap Bolt
Hex cap screws and hex tap bolts are the inch-series equivalents of metric hex bolts, manufactured to ASME B18.2.1. The ...
Hex Flange Bolt
A hex flange bolt has an integrated washer-like flange under the hex head that distributes clamping load over a wider ar...
Heavy Hex Bolt
Heavy hex bolts have a thicker head and larger across-flats dimension than standard hex bolts of the same nominal diamet...
Heavy Hex Structural Bolt (A325 / A490)
Heavy hex structural bolts to ASTM A325 and A490 are the bolts that hold up structural steel buildings and bridges. They...
Carriage Bolt
A carriage bolt has a smooth, domed round head with a square section under the head that bites into wood or a square hol...
Square Head Bolt
Square head bolts have a four-sided head, used historically before the hex head became standard. They remain in use toda...
Eye Bolt
DIN 580 forged eye bolts are lifting hardware — used to attach hooks, slings, and rigging to a load. They are forged (no...
U-Bolt
U-bolts are bent rod fasteners with threaded ends, used to clamp pipes, springs, beams, or other round/rectangular secti...
T-Head Bolt
A T-head bolt has a rectangular flat head shaped like the letter T, sized to fit into a matching T-slot. When the bolt i...
Plow Bolt
Plow bolts have a flat or slightly domed countersunk head with a square section under the head that prevents rotation. T...
Step Bolt
Step bolts are heavy-pattern carriage-style bolts with a wide, low-profile round head and a square neck. The head is wid...
Elevator Bolt
Elevator bolts have a very thin, wide flat head and a square neck under the head. Originally designed for grain elevator...
Anchor Bolt (J / L / Foundation)
Anchor bolts are designed to be cast into concrete foundations to anchor structural columns, equipment bases, and steel ...