... washer 1.Materials: low carbon alloy steel 20MnTiB 2.Property Class:8.8 or 10.9s Standard ... threaded rod, anchor bolt, nail, other off-standard fasteners and following to the drawers of products, which ... , JIS, ANSI/SAE/ASME, ISO, BS, AS standard.Diameters Metric: from M6 to M72, Inch. from ... dealing : Black, Grey(phosphated, Parkerising)6- Thread standard : Thread length tolerance according to GB/T 3103 ...