BS EN ISO 7050:1995 Cross-recessed countersunk (flat) head tapping screws (common head style)
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This International Standard specifies the characteristics of cross recessed pan head tapping screws with thread sizes from ST 2,2 to ST 9,5 inclusive.
ISO 225, Fasteners Bolts, screws, studs and nuts - Symbols and designations of dimensions.
ISO 1478, Tapping screws thread.
ISO 2702, Heat-treated steel tapping screws - Mechanical properties.
ISO 3269, Fasteners - Acceptance inspection. 1)
ISO 4042, Threaded components Electroplated coatings components.")
ISO 4759/1, Tolerances for fasteners - Part 1: Bolts, screws and nuts with thread diameters > 1,6 and < 150 mm and product grades A, B and C.
ISO 4757, Cross recesses for screws – Head configurations and gauging