Hex nuts (or finished hex nuts) are hex nuts of standard thickness and strength. They can be found in almost every industry including construction/engineering, electrical, and OEM/MRO. Hex nuts are available in steel and stainless steel, metric and inch sizes, and a variety of standard finishes including plain, zinc-yellow, and zinc CR+3. If your application requires custom plating or coating such as Xylan, zinc nickel, copper, silver, tin, or a variety of other finishes, please contact us as our plating shop specializes in finished hex nuts and heavy hex nuts.
Grades of Hex Nuts
Grade 2 Hex Nuts
Grade 2 Hex Nuts are a six-sided internally threaded fastener whose thickness is .875 D where D is the nominal nut size and 1.5D is their width across the flats, made from low carbon steel. Grade 2 nuts are the most versatile and commonly used nut design and paired with any low carbon bolt or screw that is not heat-treated. It has a specified minimum tensile strength of 74,000 psi or less.
Grade 5 Hex Nuts
Grade 5 Hex Nuts are a finished hex nut made from steel with a maximum carbon content of 0.55%, a minimum manganese content of 0.30%, and a maximum sulfur content of 0.15%. They are paired with bolts with a minimum tensile strength equal to or less than the specified proof stress of the nut (typically Grade 5 Hex Cap Screws).
Grade 8 Hex Nuts
Grade 8 Hex Nuts are a finished hex nut made from steel with a maximum carbon content of 0.55%, a minimum manganese content of 0.30%, and a maximum sulfur content of 0.05%. They are paired with bolts with a minimum tensile strength equal to or less than 150,000 psi (typically Grade 8 Hex Cap Screws).
Stainless Steel 18-8 & 316 Hex Nuts
Stainless Steel Hex Nuts are designed for use with stainless steel bolts and screws with a specified minimum tensile strength equal to or less than the specified proof stress of the mating nut. Both types of stainless steel are corrosion resistant with 316 stainless having greater resistance as well as superior strength at raised temperatures.