1. Material: Stainless steel, carbon steel. 2. Surface treatment: Black, white blue, zinc plated, Galvanized or according require. 3. Standard: DIN, ISO, JIS& ANSI, GB and BS. 4. Packing: General export packing plastic&pallet or according require 5. Grade: 4.6 to10.9 6. Dia of thread; M3 to M24 7. Length: 6mm to 3000mm. 8. Welcome customer's drawings to customization