JB/T 58651.6-1999
Fastener Product Quality Grading - Set Screws
紧固件产品质量分等 紧定螺钉
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 set screw products manufactured according to national standards and industry standards. It may also be used as a reference for quality grading of set screw products manufactured according to other standards. This standard adopts three grades: superior product, first-class product, and qualified product. This standard is applicable to single-specification product lots accepted according to GB/T 90. The dimensional symbols used in this standard are consistent with the current set screw standards.
本标准规定了按国家标准及行业标准生产的紧定螺钉类产品质量分等的原则和方法。按其他标准生产的紧定螺钉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，均与现行紧定螺钉标准一致。
Normative References
Keywords
Application Summary AI generated
Quality inspection departments of fastener manufacturers use this standard to grade set screw products. Through sampling inspection and defect scoring, products are classified into superior, first-class, and qualified grades, ensuring outgoing product quality meets requirements. This standard provides a unified quality grading basis within the industry, helping to improve the overall quality level of fastener products.
紧固件生产企业的质量检验部门使用本标准，对紧定螺钉产品进行质量等级评定。通过抽样检验和缺陷评分，将产品分为优等品、一等品和合格品，确保出厂产品质量符合要求。该标准为行业内部统一的质量分等依据，有助于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 set screw products, adopting three grades: superior, first-class, and qualified. It applies to single-specification product lots accepted according to GB/T 90 and uses dimensional symbols consistent with current set screw standards. The standard details inspection items, sampling plans, defect grades and weighted values, and specifies inspection methods including checks for width across flats, threads, mechanical properties, and other items.
本标准规定了紧定螺钉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。适用于按GB/T 90接收的单一规格产品批，并参照现行紧定螺钉标准使用尺寸代号。标准详细列出了抽查项目、抽样方案、缺陷等级及加权值，并规定了检验方法，包括对边宽度、螺纹、机械性能等项目的检测要求。
Key Sentences extracted from text
本标准规定了按国家标准及行业标准生产的紧定螺钉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。
紧定螺钉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 set screw products manufactured according to national standards and industry standards.
This standard adopts three grades: superior product, first-class product, and qualified product.
This standard is applicable 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 set screw 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
- The main technical content remains unchanged