SIS SS-ISO 272-1985 紧固件．六角产品．对面宽度

标准号：SIS SS-ISO 272-1985
中文标准名称：紧固件．六角产品．对面宽度
英文标准名称：Fasteners — Hexagon products — Widths across f lats
发布日期：1985/4/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：This International Standard specifies widths across flats for hexagon products, for example hexagon head bolts and screws, hexagon nuts and hexagon flanged bolts, screws and nuts, to be used in the respective product standards.It also specifies a logical ratio between underhead (or nut) bearing area (which determines the magnitude of the compressive stress on the bolted members relative to the clamping force applied by the fastener) and the tensile stress area of the screw thread (which governs the clamping force which can be developed by tightening the fastener for any particular strength dass of fastener). This calculation technique was applied to each of the hexagon series so that a proper grading of bearing area/stress area ratios would be available to engineering designers.