本标准规定了进行试验的程序，以确定外螺纹和内螺纹紧固件的机械性能。各项产品标准中规定了性能要求及其测定的适用试验。在测试要求独特或与这些标准程序不一致的情况下，产品标准应规定控制测试要求。本标准描述了用于确定以下性能的机械试验: 对于外螺纹紧固件:产品硬度（第4.1节）表面硬度（第4.2节）验证载荷（第4.3节）屈服强度（第4.4节）轴向拉伸强度（第4.5节）楔形拉伸强度（第4.6节）伸长率（第4.7节）内螺纹紧固件的面积缩减（第4.7节）:产品硬度（第5.1节）验证载荷（第5.2节）

This standard establishes procedures for conducting tests to determine the mechanical properties of externally and internally threaded fasteners. Property requirements and the applicable tests for their determination are specified in individual product standards. In those instances where the testing requirements are unique or at variance with these standard procedures, the product standard shall specify the controlling testing requirements. This standard describes mechanical tests for determining the following properties: For externally threaded fasteners: Product hardness (Section 4.1) Surface hardness (Section 4.2) Proof load (Section 4.3) Yield strength (Section 4.4) Axial tensile strength (Section 4.5) Wedge tensile strength (Section 4.6) Elongation (Section 4.7) Reduction of area (Section 4.7) For internally threaded fasteners: Product hardness (Section 5.1) Proof load (Section 5.2)