GB/T 3750.3-1983
Replaced
GB/T 70.3-2023
Active
National standards
GB/T 70.3-2023 Hexagon socket countersunk head screws with reduced loadability
GB/T 70.3-2023 Hexagon socket countersunk head screws with reduced loadability
Basic Information
Standard Code:
GB/T 70.3-2023
Standard Type:
National standards
Standard Status:
Active
is_force_gb:
no
CCS Name:
Fasteners
ICS Name:
Bolts, screws, and studs
Publish Date:
2023-05-23
Implement Date:
2023-12-01
Publisher:
国家市场监督管理总局、国家标准化管理委员会
Technical Committee:
全国紧固件标准化技术委员会(SAC/TC 85)
Pages:
15 pages
Scope
本文件规定了由于头部设计而降低承载能力的内六角沉头螺钉的型式尺寸、技术条件、标志标签和标记。本文件适用于螺纹规格为M2~M20,粗牙螺纹,性能等级为8.8、10.9和12.9,组别和性能等级为A250、A450、A270、A470、A280和A480,产品等级为A级的内六角沉头螺钉。
Development Information
Drafting Units:
中机生产力促进中心有限公司、上海集优标五高强度紧固件有限公司、湖南申亿机械应用研究院有限公司、机械工业通用零部件产品质量监督检测中心、大福泵业有限公司、玉环天烨机械有限公司、嘉兴奥展实业有限公司
Replace the following standards
Referenced Standards
GB/T 2-2001 Fasteners—Ends of parts with external thread
GB/T 2-2016 Fasteners—Ends of parts with external thread
GB/T 90.1-2002 Fasteners—Acceptance inspection
GB/T 90.1-2023 Fasteners—Acceptance inspection
GB/T 90.2-2002 Fasteners—Marking and packaging
GB/T 197-2003 General purpose metric screw threads—Tolerances
GB/T 197-2018 General purpose metric screw threads—Tolerances
GB/T 1237-2000 Designation system for fasteners
GB/T 3098.1-2000 Mechanical properties of fasteners—Bolts, screws and studs
GB/T 3098.1-2010 Mechanical properties of fasteners—Bolts,screws and studs
GB/T 3098.6-2000 Mechanical properties of fasteners—Bolts, screws and studs made of stainless-steel
GB/T 3098.6-2014 Mechanical properties of fasteners—Stainless steel Bolts,screws and studs
GB/T 3098.6-2023 Mechanical properties of fasteners—Stainless steel bolts,screws and studs
GB/T 3099.4-2021 Terminology of fasteners—Control,inspection,delivery,acceptance and quality
GB/T 3103.1-2002 Tolerances for fasteners—Bolts, screws, studs and nuts
GB/T 5267.1-2002 Fasteners—Electroplated coatings
GB/T 5267.1-2023 Fasteners—Electroplate coating
GB/T 5267.2-2002 Fasteners—Non-electrolytically applied zinc flake coatings
GB/T 5267.2-2017 Fasteners—Non-electrolytically applied zinc flake coatings
GB/T 5267.2-2021 Fasteners—Non-electrolytically applied zinc flake coatings
GB/T 5276-2015 Fasteners—Bolts,screws,studs and nuts—Symbols and descriptions of dimensions
GB/T 5779.1-2000 Fasteners—Surface discontinuities—Bolts,screws and studs for general requirements
GB/T 5779.3-2000 Fasteners—Surface discontinuities—Bolts,screws and studs for special requirements
GB/T 16938-1997 Fasteners—General requirements for blots,screws,studs and nuts
GB/T 16938-2008 Fasteners—General requirements for bolts,screws,studs and nuts
Adopt standards
ISO 10642:2019
Related Standards
GB/T 5277-1985
Active
GB/T 5277-1985 Fasteners—Clearance holes for bolts and screws
GB/T 6560-1986
Replaced
GB/T 6560-1986 Cross recessed pan head thread forming screws
GB/T 6561-1986
Replaced
GB/T 6561-1986 Cross recessed countersunk head thread forming screws
GB/T 6562-1986
Replaced
GB/T 6562-1986 Cross recessed raised countersunk head thread forming screws
GB/T 6563-1986
Replaced