1.1 本规范涵盖了对标称直径为0.25至1.50英寸（含）的不锈钢螺母的要求，这些螺母由多种常用合金制成，用于需要一般耐腐蚀性的服务应用。 1.2 涵盖了七组不锈钢合金，包括十四组奥氏体、两组铁素体、四组马氏体和一组沉淀硬化。 集团 合金 A. 条件 B 1. 304、305、304L 384、18-9LW， 302小时，304J3 C （CW） 冷加工 D 2. 316、316升 （CW） 冷加工 D 3. 321, 347 （CW） 冷加工 D 4. 430 E （CW） 冷加工 D 5. 410 F H 硬化和回火 6. 431 H 硬化和回火 7. 630 （啊） 老化硬化 1.3 提供了可选性质的补充要求，仅在制造商和买方在询价和订购时达成一致时适用。 1.4 本规范中包含的与螺母一起使用的合适螺栓、六角带帽螺钉和螺柱包含在规范中 F593 除非另有规定，否则与这些螺母一起使用的所有螺栓、六角带帽螺钉和螺柱应符合规范的要求 F593 并且应属于同一合金组。 1.5 以英寸-磅单位表示的值应被视为标准值。括号中给出的值是对国际单位制的数学转换，仅供参考，不被视为标准值。 1.6 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、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。 =====意义和用途====== 15.1 为了确定是否符合本规范中列出的性能的规定限值，应按照惯例对观察值或计算值进行四舍五入 E29 .

1.1 This specification covers the requirements for stainless steel nuts 0.25 to 1.50 in., inclusive, in nominal diameter in a number of alloys in common use and intended for service applications requiring general corrosion resistance. 1.2 Seven groups of stainless steel alloys are covered, including fourteen austenitic, two ferritic, four martensitic, and one precipitation hardening. Group Alloys A Condition B 1 304, 305, 304L 384, 18–9LW, 302HQ, 304J3 C (CW) cold worked D 2 316, 316L (CW) cold worked D 3 321, 347 (CW) cold worked D 4 430 E (CW) cold worked D 5 410 F (H) hardened and tempered 6 431 (H) hardened and tempered 7 630 (AH) aged hardened 1.3 Supplementary requirements of an optional nature are provided, applicable only when agreed upon by the manufacturer and the purchaser at the time of the inquiry and order. 1.4 Suitable bolts, hex cap screws, and studs for use with nuts included in this specification are covered by Specification F593 . Unless otherwise specified, all bolts, hex cap screws, and studs used with these nuts shall conform to the requirements of Specification F593 and shall be of the same alloy group. 1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered 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. ====== Significance And Use ====== 15.1 For the purposes of determining compliance with the specified limits for properties listed in this specification, an observed value or calculated value shall be rounded in accordance with Practice E29 .