1.1 本规范 2. 覆盖淬火和回火钢六角带帽螺钉、螺栓和螺柱，直径为1.0英寸，最小抗拉强度为120 ksi。并且更小；直径超过1.0英寸时为105 ksi。至1 1. / 2. 在里面直径1为90 ksi 3. / 4. 在里面至3.0英寸。包含全部费用本规范中的术语“紧固件”表示六角带帽螺钉、螺栓和螺柱。 1.2 紧固件用于一般工程用途。 1.3 紧固件按直径提供 1. / 4. 至3.0英寸。包含全部费用它们由表示化学成分的类型指定，如下所示: 类型 描述 I型 普通碳钢、碳硼钢、合金钢或合金硼钢 类型2 2003年撤销 类型3 耐候钢 1.4 本规范中使用的术语在术语中定义 F1789 除非本规范另有规定。 1.5 以英寸-磅为单位的数值应视为标准值。本标准不包括其他计量单位。 1.6 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。

1.1 This specification 2 covers quenched and tempered steel hex cap screws, bolts, and studs having a minimum tensile strength of 120 ksi for diameters 1.0 in. and smaller; 105 ksi for diameters over 1.0 in. to 1 1 / 2 in.; and 90 ksi for diameters 1 3 / 4 in. to 3.0 in. inclusive. The term "fasteners" in this specification denotes hex cap screws, bolts, and studs. 1.2 The fasteners are intended for general engineering use. 1.3 The fasteners are furnished in diameters 1 / 4 to 3.0 in. inclusive. They are designated by type denoting chemical composition as follows: Type Description Type I Plain carbon steel, carbon boron steel, alloy steel, or alloy boron steel Type 2 Withdrawn 2003 Type 3 Weathering steel 1.4 Terms used in this specification are defined in Terminology F1789 unless otherwise defined in this specification. 1.5 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.