1. Standards
DIN, &ANSI
2. Material
Stainless steel, carbon steel, copper, iron
3. Size
M4-M64
4. Grade
DIN931/933 4.8, 6.8, 8.8, 10.9, 12.9
ANSI Gr. 2; Gr. 5; Gr. 8
5. Surface treatment
Black oxide, black zinc, black chromium, and according your requirement
6. Packing
Bulk(25kgs/carton) or small package(according to the customers' requirement)