ISO 965-4:1998 ISO普通米制螺纹 公差 镀锌后以公差定位H或G攻丝的热浸镀锌外螺纹与内螺纹啮合的尺寸极限.
标准编号：ISO 965-4:1998
中文名称：ISO普通米制螺纹 公差 镀锌后以公差定位H或G攻丝的热浸镀锌外螺纹与内螺纹啮合的尺寸极限.
英文名称：ISO general purpose metric screw threads — Tolerances — Part 4: Limits of sizes for hot-dip galvanized external screw threads to mate with internal screw threads tapped with tolerance position H or G
发布日期：1998-12
标准范围
ISO 965的本部分规定了符合ISO 262的ISO通用米制外螺纹的节径和顶径偏差和尺寸限制，其基本轮廓符合ISO 68-1。根据ISO 965本部分，外螺纹旨在与热浸镀锌后公差位置为H或G的内螺纹配合。根据ISO 965-1中规定的公差和基本偏差，根据以下公式得出规定公差质量的尺寸限值:esaz=2（300+20P）哪里es用微米表示；P以毫米为单位。根据ISO 965本部分的螺纹公差制造的产品在极限拉伸载荷低于ISO 898规定的极限拉伸载荷时可能会出现故障-1由于应力区域减小。根据ISO 965本部分规定，具有螺纹公差的外螺纹不得与根据ISO 965-5规定具有螺纹公差的内螺纹配合，因为此类组合将产生严重的螺纹剥落风险。注:如果未规定公差等级6az，则如果产品离心，则外螺纹与公差位置为6az的内螺纹配合；如果产品未离心，则与公差位置为6AX的热浸镀锌内螺纹配合。
This part of ISO 965 specifies deviations and limits of sizes for pitch and crest diameters for ISO general purpose metric external screw threads conforming to ISO 262 having a basic profile according to ISO 68-1.External screw threads according to this part of ISO 965 are intended to mate with internal screw threads tapped with tolerance position H or G after hot dip galvanizing.The limits of sizes for the tolerance quality specified are derived from tolerances specified in ISO 965-1 and the fundamental deviations according to the following formula:esaz = 2(300 + 20P)wherees is expressed in micrometers;P is expressed in millimeters.Products made with thread tolerances in accordance with this part of ISO 965 may show failure at lower ultimate tensile loads than those specified in ISO 898-1 due to reduction of the stress area.External screw threads with thread tolerances according to this part of ISO 965 must not be mated with internal screw threads with thread tolerances according to ISO 965-5 because such combinations will create severe risk for thread stripping.NOTE If the tolerance class 6az is not specified the external screw threads are to mate with internal screw threads with tolerance position 6AZ if the products are centrifuged and with hot-dip galvanized internal screw threads with tolerance position 6AX if the products are not centrifuged.
标准预览图
