GB/T 5782 half thread hex head bolt, Grade 12.9 10.9 8.8

Surface coating available: Plain, Dacromet, Black, Geomet, HDG, Dorken, Delta, Electro plated, TZN

Grade: 8.8 10.9 12.9

Nut grade: 8 10 12

Washer hardness: HV100, HV200, HV300

Thread size: M20-M80

Mechanical properties: ISO898-1