Hex nuts are one of the most common nuts available and are used with anchors, bolts, screws, studs, threaded rods and on any other fastener that has machine screw threads. Hex is short for hexagon, which means they have six sides.
Hex nut is a nut, a part that is screwed together with a bolt or screw for fastening. A component that must be used in all production machinery is divided into carbon steel, stainless steel, non-ferrous metals (such as copper), etc. Several types.
Hex Nut, common finishes for steel are zinc plating and hot dip galvanizing. Zinc, the most popular and least expensive commercial plating, offers moderate corrosion resistance. Hot dip galvanized is a thick coating of zinc that protects against corrosion in harsh environments.
Stainless steel, though, is a better choice when corrosion is of concern except when submerged in salt water without free oxygen where it can suffer from severe pitting corrosion. Unplated and uncoated steel hex nuts—referred to as plain finish—may also be available and are susceptible to rust. Not all types are available in all materials and finishes.
Standard: ASME/ANSI B18.2.2; DIN934, DIN555
Measurement system: INCH, Metric
Size: 1/4''–1-1/2’’; M6 – M42
Grade / Class: SAE J995 Gr.2, 5,8; CL4, 5, 6, 8, 10, 12
Thread: M, UNC, UNF
Finish: Black Oxide, Zinc Plated(Clear/Blue/Yellow/Black),H.D.G , Y.Z.P ,Plain, Nickel, Chrome.
Customized production is welcomed
It is advisable to match materials and finishes of hex nuts, washers and bolts/screws. When using hot dipped galvanized bolts, always use hot dipped galvanized nuts, which are tapped oversize (threaded larger than normal) to accommodate the thick zinc coating on the bolts (using a galvanized nut on a non-galvanized bolt will result in an unacceptably loose fit and using a plain finish or zinc plated nut on a hot dip galvanized bolt will result in a fit that is much too tight).
Stainless steel hex nuts and bolts/screws used together are susceptible to thread galling and seizing. While it may not be completely preventable, it can be substantially reduced. A thread lubricant is the most effective method. Alternatively, stainless steel alloys having different hardnesses—like a 316 nut and a 304 bolt—have less tendency to gall.