JB/T 58651.3-1999
Fastener Product Quality Grading - Studs
紧固件产品质量分等 螺柱
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 Criteria → 6 Inspection Methods
Scope
This standard specifies the principles and methods for quality grading of stud-type products manufactured according to national standards and industry standards. It may also be used as a reference for quality grading of stud-type products manufactured according to other standards. This standard adopts three grades: superior product, first-grade product, and qualified product. This standard applies to single-specification product lots accepted in accordance with GB/T 90. The dimension symbols used in this standard are consistent with current stud standards.
本标准规定了按国家标准及行业标准生产的螺柱类产品质量分等的原则和方法。按其他标准生产的螺柱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，均与现行螺柱标准一致。
Normative References
Keywords
Application Summary AI generated
Fastener manufacturers and quality inspection departments use this standard to grade the quality of stud products. With three quality levels (superior, first-grade, and qualified) and defined defect weight values, it helps determine product compliance. This standard provides a unified basis for evaluating stud quality, contributing to improved product quality in the industry.
紧固件生产企业和质量检验部门使用本标准，对螺柱类产品进行质量等级划分。通过三级分等（优等品、一等品、合格品）和明确的缺陷加权值，帮助判定产品是否符合要求。该标准为统一螺柱质量评价提供了依据，有助于提升行业产品质量水平。
AI Summary AI generated
This standard specifies the principles and methods for quality grading of stud products, adopting three grades: superior, first-grade, and qualified. It applies to single-specification product lots manufactured according to national or industry standards. The standard defines inspection items, sampling plans, defect grades, and weight values, and specifies inspection methods for threads, dimensions, surface defects, and mechanical properties. Quality grades are determined by calculating unit defect scores, providing a unified basis for evaluating stud product quality.
本标准规定了螺柱类产品质量分等的原则和方法，采用优等品、一等品、合格品三级分等。适用于按国家标准或行业标准生产的单一规格产品批。标准明确了抽查项目、抽样方案、缺陷等级及加权值，并规定了检验方法，包括螺纹、尺寸、表面缺陷和机械性能等项目的检测。通过单位缺陷分计算确定质量等级，为螺柱产品的质量评价提供了统一依据。
Key Sentences extracted from text
本标准规定了按国家标准及行业标准生产的螺柱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。
螺柱产品的抽查项目、抽样方案、缺陷等级及加权值按表1 规定。
This standard specifies the principles and methods for quality grading of stud-type products manufactured according to national standards and industry standards.
This standard adopts three grades: superior product, first-grade product, and qualified product.
This standard applies to single-specification product lots accepted in accordance with GB/T 90.
The definitions of defect grades, defect weight values, and unit defect score criteria, as well as the calculation formula for unit defect score, are specified in JB/T 58651.1.
The inspection items, sampling plan, defect grades, and weight values for stud products are specified in Table 1.
Standard Timeline
Changes from replaced version:
- 对原标准进行了编辑性的修改，其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.