The specification for hexagon nuts with metric thread diameters is DIN 934. The standard includes nuts with a size range of M1.6 to M64. Since the grade is normally defined separately for the bolt or stud being used with the nut, DIN 934 does not specify a specific grade for the material of the nut. Hexagon nut grades are primarily distinguished by markings on the nut, with Grade 8, Grade 5, and Grade 2 being the most frequently used grades.
Hexagonal nuts made of carbon or alloy steel, stainless steel, or nonferrous materials must adhere to the DIN 934 standard specification. The material, diameter, and thread pitch of a DIN 934 nut all affect its strength.
A carbon steel M12x1.75 DIN 934 nut, for instance, has a minimum tensile strength of 700N/mm2 and a minimum proof load of 490N/mm2. A stainless steel A2 M12x1.75 DIN 934 nut, on the other hand, has a minimum tensile strength of 500N/mm2 and a minimum proof load of 210N/mm2.
The use and application of a DIN 934 nut can also affect its strength, as can other elements like temperature, vibration, and corrosion resistance.
