ASME B18.6.4-1999 螺纹成形和螺纹切削攻丝螺钉和金属传动螺杆(英制系列)

标准号：ASME B18.6.4-1999
中文标准名称：螺纹成形和螺纹切削攻丝螺钉和金属传动螺杆(英制系列)
英文标准名称：Thread Forming And Thread Cutting Tapping Screws And Metallic Drive Screws, Inch Series
标准类型：J13
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：J13
国际标准分类号：21.060.10
适用范围：This standard covers the complete general and dimensional data for the various types of slotted and recessed head tapping screws and metallic drive screws. Also included are appendixes which provide specifications and instructions for protrusion gaging of flat countersunk head screws, across corners gaging of hex head screws, penetration and wobble gaging of recessed head screws, approximate hole sizes, wrench openings for hex head products, means for determining effective grip lengths on screws, documentation for screw types and head types relegated to not-recommended or limited usage status, and formulas on which dimensional data are based. It shall be understood, however, that where questions arise concerning acceptance of products, the dimensions in the tables shall govern over recalculation by formula.