Metric - Class 8.8 - High Tensile - Zinc Yellow Plated - Hex Flange Head - Bolt and Set Screws. Supacheap Bolts Hexagon Flanged Head Class 8.8 High Tensile Bolts and Set Screws are manufactured to JIS Standard 1189 and our yellow zinc plated finish offers corrosion protection and suitable for general purpose higher strength bolting where maximum adjustment may be needed, and for fastening blind threaded components where a thread, running the full length of the bolt, is required. Typical applications for this very widely used product include machine builders, automotive applications and the mining industry. Supacheap Bolts currently stock M5(0.8) 8mm AF, M6(1.0) 10mm AF, M8(1.25) 12mm AF, M10(1.25) 14mm AF and M10(1.50) 14mm AF diameters up to 50mm in length for certain diameters. Please note: the length of a bolt or set screw is measured from under the head.