Grade 12.9 High Tensile Socket Cap Allen Bolts Standard:DIN 912Material:Grade 12.9 Carbon SteelFinish:oxidation Thread Type:MetricThread Pitch:up to standardA: (Diameter)M3-M45B: (Head Diameter)up to standardC: (Head Depth)up to standardD: (Socket Depth)up to standardE: (Shank Length)up to standardF: (Thread Length)up to standardK: (Socket Size)up to standard