Hex bolts or Hex cap screws are commonly used in fabrication and construction business. We also call them hex cap bolts, machine bolts, or hexagon screw head bolts. A wide range of sizes find use in common work. We use it in a variety of places such as petrochemical industry, construction, food machinery industry, and solar power installations.
Stainless steel is usually used for most applications due to its long lasting capability and high strength. Stainless steel 18-8 is one of the common hardware application steel in use for making hex bolts and nuts. The next is the stainless steel 316 grade that has high corrosion resistance. It is mostly used in salt water applications. It is costlier than 18-8 steel. If the nut or bolt burrs or scratches, it will not affect the life and cause rust because the resistant material to corrosion is present inside the material itself. They have a typical clean silver color and shiny appearance. Stainless steel bolts become slightly magnetic due to threading and cold forming. Uses of this type of fasteners are usual for external fastening and for decorative purposes because it is so attractive.
The zinc plated steel is low carbon steel that is coated with zinc. This is either Grade 2 or Grade A307A. It has moderate resistance to corrosion. Grade 5 zinc plated steel is tempered medium carbon steel. This grade is between Grade 2 and Grade 8. Most automotive applications use this grade of steel. In Grade 8 we have two types. One is zinc plated Grade 8 yellow steel and the other is Grade 8 steel plain finish. You can get more details from the Hex Nut Bolt Manufacturers before you place your order.

Both these steels are tempered medium carbon steels. Grade 8 is stronger than Grade 5 and is used in high strength applications. Plain finish means that it is not plated. Chrome plate steel is another kind of steel. This has a mirror like finish. Hot dipped galvanised steel is also used. Both this and chrome steel are low carbon steel for general use. Both have high degree of resistance to corrosion. Structural bolt steel
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