JB/T 58651.13-1999
Fastener Product Quality Grading - Eyebolt (Nut)
紧固件产品质量分等 吊环螺钉（螺母）
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 名词、术语及计算公式 → 4 抽查项目、抽样方案、缺陷等级及加权值 → 5 分等标准 → 6 检验方法 Foreword → 1 Scope → 2 Normative References → 3 Terms, Definitions and Calculation Formulas → 4 Inspection Items, Sampling Plan, Defect Grades and Weighted Values → 5 Grading Standard → 6 Inspection Methods
Scope
This standard specifies the principles and methods for quality grading of eyebolts (hereinafter referred to as screws) and eyenuts (hereinafter referred to as nuts) produced according to national standards and industry standards. It may also be used as a reference for quality grading of eyebolt and eyenut products produced according to other standards. This standard adopts three grades, namely superior product, first-grade product, and qualified product. This standard applies to single-specification product lots accepted according to GB/T 90. The dimensional symbols used in this standard are consistent with the current eyebolt (nut) standards.
本标准规定了按国家标准及行业标准生产的吊环螺钉（以下简称螺钉）及吊环螺母（以下简称螺母）类产品质量分等的原则和方法。按其他标准生产的吊环螺钉及吊环螺母类产品进行质量分等时亦可参照使用。 本标准采用三级分等，即优等品、一等品、合格品。 本标准适用于按GB/T 90 接收了的单一规格产品批。 本标准中使用的尺寸代号，均与现行吊环螺钉（螺母）标准一致。
Normative References
Keywords
Application Summary AI generated
Fastener manufacturers and quality inspection departments use this standard to grade the quality of eyebolt and eyenut products. It employs a three-tier grading system (superior, first-grade, qualified) to evaluate product quality levels, ensuring compliance with national and industry standards. This standard helps regulate the market and improve the overall quality of fastener products.
紧固件制造企业和质量检验部门使用本标准，对吊环螺钉和吊环螺母产品进行质量分等。通过三级分等（优等品、一等品、合格品）来评估产品质量水平，确保产品符合国家标准和行业要求。该标准有助于规范市场，提升紧固件产品的整体质量水平。
AI Summary AI generated
This standard specifies the principles and methods for quality grading of eyebolt and eyenut products, adopting three grades: superior, first-grade, and qualified. It applies to single-specification product lots accepted according to GB/T 90 and references multiple related standards. Quality assessment is performed through defect grades, weighted values, and sampling plans to ensure products meet technical requirements. The standard provides a unified quality grading basis for the fastener industry, helping to improve product quality and consistency.
本标准规定了吊环螺钉和吊环螺母产品的质量分等原则和方法，采用优等品、一等品、合格品三级分等。标准适用于按GB/T 90接收的单一规格产品批，并引用了多项相关标准。通过缺陷等级、加权值和抽样方案对产品进行质量评估，确保产品符合技术要求。该标准为紧固件行业提供了统一的质量分等依据，有助于提升产品质量和一致性。
Key Sentences extracted from text
本标准规定了按国家标准及行业标准生产的吊环螺钉（以下简称螺钉）及吊环螺母（以下简称螺母）类产品质量分等的原则和方法。
本标准采用三级分等，即优等品、一等品、合格品。
本标准适用于按GB/T 90 接收了的单一规格产品批。
缺陷等级、缺陷加权值和单位缺陷分标准的定义以及单位缺陷分的计算公式按JB/T 58651.1 规定。
螺钉、螺母产品的质量分等标准按表2 规定。
This standard specifies the principles and methods for quality grading of eyebolts (hereinafter referred to as screws) and eyenuts (hereinafter referred to as nuts) produced according to national standards and industry standards.
This standard adopts three grades, namely superior product, first-grade product, and qualified product.
This standard applies to single-specification product lots accepted according to GB/T 90.
The definitions of defect grade, defect weighted value, and unit defect score standard, as well as the calculation formula for unit defect score, are specified in JB/T 58651.1.
The quality grading standard for screw and nut products is specified in Table 2.
Standard Timeline
Changes from replaced version:
- 对原标准进行了编辑性的修改，主要技术内容没有变化
- Editorial modifications were made to the original standard, with no changes to the main technical content.