JB/T 58651.8-1999
Fastener Product Quality Grading - Self-Tapping Screws
紧固件产品质量分等 自攻螺钉
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 self-tapping screw products manufactured according to national standards and industry standards. It may also be used as a reference for quality grading of self-tapping 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 in accordance with GB/T 90. The dimensional symbols used in this standard are consistent with the current self-tapping screw standards. The self-tapping screw products covered by this standard include self-tapping screws, self-drilling screws, and wallboard screws.
本标准规定了按国家标准及行业标准生产的自攻螺钉类产品质量分等的原则和方法。按其他标准生产的自攻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，均与现行自攻螺钉标准一致。 本标准适用的自攻螺钉类产品包括自攻螺钉、自攻锁紧螺钉和墙板自攻螺钉。
Normative References
Keywords
Application Summary AI generated
Fastener manufacturers and quality inspection departments use this standard to evaluate the quality grade of self-tapping screws, self-drilling screws, and wallboard screws. It establishes three quality levels (superior, first-class, and qualified) with defined defect weights, ensuring products meet national or industry standards. This standard provides a unified basis for quality control, helping to improve the overall quality level of the fastener industry.
紧固件制造企业和质量检验部门使用本标准，对自攻螺钉、自攻锁紧螺钉和墙板自攻螺钉等产品进行质量等级评定。通过三级分等（优等品、一等品、合格品）和明确的缺陷加权值，确保产品符合国家标准或行业标准。该标准为产品质量控制提供了统一依据，有助于提升紧固件行业的整体质量水平。
AI Summary AI generated
JB/T 58651.8-1999 specifies the principles and methods for quality grading of self-tapping screw products, applicable to self-tapping screws, self-drilling screws, and wallboard screws produced according to national or industry standards. It adopts three quality grades (superior, first-class, qualified) and evaluates based on unit defect scores calculated from weighted defect values. The standard details inspection items, sampling plans, defect grades, and inspection methods, referencing multiple related standards, providing a unified quality grading basis for the fastener industry.
本标准JB/T 58651.8-1999规定了自攻螺钉类产品的质量分等原则和方法，适用于按国标或行标生产的自攻螺钉、自攻锁紧螺钉和墙板自攻螺钉。采用优等品、一等品、合格品三级分等，并基于缺陷加权值计算单位缺陷分进行评定。标准详细列出了抽查项目、抽样方案、缺陷等级及检验方法，引用多项相关标准，为紧固件行业提供了统一的质量分级依据。
Key Sentences extracted from text
本标准规定了按国家标准及行业标准生产的自攻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。
本标准适用的自攻螺钉类产品包括自攻螺钉、自攻锁紧螺钉和墙板自攻螺钉。
自攻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 self-tapping 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 in accordance with GB/T 90.
The self-tapping screw products covered by this standard include self-tapping screws, self-drilling screws, and wallboard screws.
The quality grading standard for self-tapping 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