1.1 本规范涵盖了用钢和合金钢制造的淬火和回火螺栓的化学、尺寸、物理和机械要求，单位为英寸。螺栓可用作结构螺栓组件，该结构螺栓组件包括固定花键螺栓、合适的螺母和至少一个此处引用的垫圈。 1.2 预期用途: 1.2.1 根据本规范制造的螺栓，以及根据本规范提供的结构螺栓组件，旨在用于《使用高强度螺栓的结构接头规范》中涵盖的结构连接，并使用扭矩和角度或部分回转/组合安装方法进行安装。 1.2.2 本规范中的结构螺栓组件的公称直径为 1. / 2. 到1- 1. / 4. 包括在内。 1.3 分类 1.3.1 结构螺栓组件被指定为144级。 1.3.2 螺栓由表示原材料化学成分的类型指定。 类型1- 144ksi——碳钢、碳硼钢、合金钢或添加硼的合金钢 类型3- 144ksi耐候钢 1.4 本规范中使用的术语定义见术语 F1789 . 1.4.1 扭矩和角度固定花键结构螺栓-- 该螺栓包括整体固定的花键端，该花键端延伸超过螺栓的螺纹部分并且用作扭矩和角度固定的花键结构螺栓组件的部件。 1.4.2 扭矩和角度固定花键结构螺栓组件 2. — 由扭矩组成的紧固件组件- 以及带适当螺母和至少一个垫圈的角度固定花键螺栓，使用特殊的电动扳手和套筒系统安装和拧紧，该系统具有接合螺栓固定花键端的内套筒和接合并转动螺母的外套筒，在两种独立且不同的操作中，第一种是受控扭矩施加，第二种是指定角度。 1.4.3 组合方法-- 一种包括两个步骤的紧固方法，第一个紧固步骤使用扭矩调节工具，第二个紧固步骤将指定的转动施加到组件的转动部分。也称为“零件车削方法”。 1.5 本标准并不旨在解决与其使用相关的所有安全问题（如有）。 本标准的使用者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。 1.6 ASTM国际对与本标准中提及的任何项目相关的任何专利权的有效性不持任何立场。明确建议本标准的用户，确定任何此类专利权的有效性以及侵犯此类权利的风险完全由他们自己负责。 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 This specification covers chemical, dimensional, physical and mechanical requirements for quenched and tempered bolts manufactured from steel and alloy steel, in inch dimensions. The bolts are available as structural bolting assemblies which include a fixed spline bolt, a suitable nut and at least one washer covered by reference herein. 1.2 Intended Use: 1.2.1 Bolts manufactured under this specification, and structural bolting assemblies supplied under this specification, are intended for use in structural connections covered in the Specification for Structural Joints Using High-Strength Bolts and installed using the torque-and-angle or part turn/combined installation method. 1.2.2 Structural bolting assemblies in this specification are furnished in nominal diameters from 1 / 2 to 1- 1 / 4 in. inclusive. 1.3 Classification: 1.3.1 Structural bolting assemblies are designated as Grade 144. 1.3.2 Bolts are designated by type denoting raw material chemical composition. Type 1 - 144ksi - carbon steel, carbon boron steel, alloy steel or alloy steel with boron addition Type 3 - 144ksi - weathering steel 1.4 Terms used in the specification are defined in Terminology F1789 . 1.4.1 Torque-and-Angle Fixed-Spline Structural Bolt— bolt that includes an integral fixed-spline end which extends beyond the threaded portion of the bolt and is used as a component of a torque-and-angle fixed-spline structural bolting assembly. 1.4.2 Torque-and-Angle Fixed-Spline Structural Bolting Assembly 2 — a fastener assembly comprised of a torque-and-angle fixed-spline bolt with a suitable nut and at least one washer, installed and tightened using a special electric wrench and socket system which has an inner socket that engages the fixed-spline end of the bolt and with an outer socket that engages and turns the nut, in two separate and distinct operations, the first is a controlled torque application and the second is a specified angle. 1.4.3 Combined Method— A tightening method comprised of two steps, the first tightening step using a torque regulating tool and the second tightening step in which a specified turn is applied to the turned part of the assembly. Also known as the ‘part turn method’. 1.5 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. 1.6 ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. 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.