Carbon Steel Fasteners

No different elements – used as an alloying agent, not other types of steel, which makes nuts and bolts known as low-cost bolts. Carbon steel nut and bolt grades are divided into three different categories based on the carbon content of mild, medium and high carbon steels.

High carbon steel bolts have a carbon content between 0.60 – 1.25%. High carbon steel alloys have manganese content in the range of 0.30 – 0.90%. Of all three grades, high carbon steel threaded rod has the highest hardness and toughness while exhibiting the lowest ductility. The high wear resistance comes from the fact that these screws are almost always hardened and tempered.

Nuts are attached to corresponding bolts or rods to secure items. Cap nuts protect the threads of fasteners by preventing them from protruding. The locknut and locknut are locked on the bolt to prevent loosening. Thumb nut and wing nut are manually adjustable. The connecting nut is an extension for connecting two threaded rods.