Grade classification of MS nut bolts?

The grade classification of MS (Mild Steel) nut bolts typically refers to their strength and load-bearing capacity, which is indicated by a grade number. Common grades include Grade 4.6, Grade 8.8, and Grade 10.9, where the first number represents the nominal tensile strength in megapascals (MPa), and the second number indicates the yield strength ratio. Higher grade numbers denote stronger materials suitable for heavy-duty applications. It's important to choose the appropriate grade based on the specific requirements of the application to ensure safety and reliability.