Tapping screw and washer assemblies with plain washers subscription-only BS EN 4652-113 specifies the

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Tapping screw and washer assemblies with plain washers subscription-only BS EN 4652-113 specifies the1 Scope This International Standard specifies the requirements for tapping screws and plain washer assemblies with thread sizes from ST2,2 to ST9,5 inclusive, flat seating heads and mechanical properties as specified in ISO 2702. The plain washers are captive, i. e. prevented from disassembly and free to rotate.