High-quality stainless steel hexagon socket bolts

  The performance level of Stainless Steel Bolts is 8.8, which refers to the material’s tensile strength limit of 800MPa and yield limit of 640MPa.

The performance grades of stainless steel bolts, studs and studs are divided into 10 grades: from 3.6 to 12.9. The number before the decimal point represents 1/100 of the material's tensile strength limit, and the number after the decimal point represents 10 times the ratio of the material's yield limit to its tensile strength limit.

The performance level of nuts is divided into 7 levels, from 4 to 12. The number roughly represents 1/100 of the minimum stress a Stainless Steel Nut is guaranteed to withstand.

For unified inch threads, there are three thread grades for external threads: 1A, 2A and 3A, and three grades for internal threads: 1B, 2B and 3B, all of which are clearance fits. The higher the level number, the tighter the fit.

1. Classes 1A and 1B, very loose tolerance classes, which are suitable for the tolerance fit of internal and external threads.

2. Levels 2A and 2B are the most common thread tolerance levels specified for British series mechanical Stainless Steel Fasteners.

3. Grade 3A and 3B, screw together to form the tightest fit, suitable for stainless steel standard parts with tight tolerances, and used in safety-critical designs.