AS B148-1956 统一六角螺栓，螺丝和螺母（UNC和UNF螺纹）及平垫圈．重系列

标准号：AS B148-1956
中文标准名称：统一六角螺栓，螺丝和螺母（UNC和UNF螺纹）及平垫圈．重系列
英文标准名称：Unified black hexagon bolts, screws and nuts (UNC and UNF threads) and plain washers - Heavy series
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
国际标准分类号：21.060.01
适用范围：Gives the dimensions and general requirements in a range of nominal sizes from ？ to 2 in. Detailed dimensions of bolts, screws, ordinary nuts, lock nuts, slotted nuts and plain washers are given and provision is also made for bolts faced under the head and machined on the shank, and machined nuts. Formulas for the calculation of dimensions for bolts and screw heads and nuts in intermediate sizes, and sizes larger than 2 in. are given in an appendix.