... : M6-M30; 2. Grade:4.8, 6.8, 8.8, 10.9; 3. ANSI, DIN, ISO, BS and JIS; 4. Black, Zinc, Zinc ... of Bolts. Standard: M6-M100; Class: Gr. 2H, 2HM, , GR. 4, GR. 7, 7M, GR. B7. GR. B7M Gr6, Gr8, Gr10 ... , ASTM A193-B7, B7M, ASTM A325, ASTM A449, A490, GRADE-5, GRADE-8, ASTM A563, and A320-L7; DIN6914, DIN6915, DIN 933 ...