A bolt with a large bearing surface (called a flange) and a 12-point wrenching surface.
The 12-point head is easy to install with a pneumatic wrench, making this an aftermarket choice for mining equipment, cranes and other heavy equipment.
An anchor bolt can be embedded in concrete or masonry and is used for construction or structural assemblies.
Eye bolts (eyebolts) are threaded bolts with a loop or eye at one end.
The eye is used to anchor a cable, rope or chain.
Button head rib bolts are used in the same way as a rivet would be used. They are forced into a mating hole usually by a sledge hammer until flush.
Hex bolts used in rotating mills are oftentimes referred to as rot mill bolts.
They have a hexagonal head on one end, a washer face on the bearing surface and and a threaded shaft on the other end. The head of a heavy hex bolt is wider and thicker than that of a hex bolt.
A threaded rod having the unthreaded end reverse bent to approximately a semicircle.
Used in applications where a formed shank shape, rather than a standard head, is desired for assembly purposes.
The most common bolt used in the mining industry, liner bolts are used to hold castings (linings) in grinding mills.
They are also used in the scrap metal industry and are found in many car shredders (and are referred to as shredder bolts).
U-bolts have threads on each end and can be bent into a semicircular U-shape or a shape with two right angles.