Standard No.:	GB/T 2672-2017
English Name:	Hexalobular socket pan head screws
Chinese Name:	内六角花形盘头螺钉
Chinese Classification:	J13    Fastener
Professional Classification:	GB    National Standard
ICS Classification:	21.060.10 21.060.10    Bolts, screws, studs 21.060.10
Issued by:	AQSIQ, SAC
Issued on:	2017-07-12
Implemented on:	2018-2-1
Status:	valid
Superseding:	GB/T 2672-2004 Hexalobular socket pan head screws
Language:	English
File Format:	PDF
Word Count:	3500 words
Price(USD):	80.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the types, dimensions, specifications and designation of hexalobular socket pan head screws. This standard is applicable to hexalobular socket pan head screws of product grade A and with thread sizes from M2 up to and including M10, with property class 4.8, A2-70, A3-70, CU2 and CU3. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 2 Fasteners — Ends of Parts with External Thread (GB/T 2-2016, ISO 4753: 2011, MOD) GB/T 90.1 Fasteners — Acceptance Inspection (GB/T 90.1-2002, idt ISO 3269:2000) GB/T 90.2 Fasteners — Marking and Packaging GB/T 193 General Purpose Metric Screw Threads — General Plan (GB/T 193-2003, ISO 261:1998, MOD) GB/T 1237 Designation System for Fasteners (GB/T 1237-2000, eqv ISO 8991:1986) GB/T 3098.1 Mechanical Properties of Fasteners — Bolts, Screws and Studs (GB/T 3098.1-2010, ISO 898-1:2009, MOD) GB/T 3098.6 Mechanical Properties of Fasteners — Stainless Steel Bolts, Screws and Studs (GB/T 3098.6-2014, ISO 3506-1:2009, MOD) GB/T 3098.10 Mechanical Properties of Fasteners — Bolts, Screws, Studs and Nuts Made of Non-ferrous Metals (GB/T 3098.10-1993, eqv ISO 8839:1986) GB/T 3103.1 Tolerances for Fasteners — Bolts, Screws, Studs and Nuts (GB/T 3103.1-2002, idt ISO 4759-1:2000) GB/T 5267.1 Fasteners — Electroplated Coatings (GB/T 5267.1-2002, ISO 4042:1999, IDT) GB/T 5267.2 Fasteners — Non-electrolytically Applied Zinc Flake Coatings (GB/T 5267.2-2002, ISO 10683: 2000, IDT) GB/T 5267.4 Passivation of Corrosion-resistant Stainless-steel Fasteners (GB/T 5267.4-2009, ISO 16048:2003, IDT) GB/T 5276 Fasteners — Bolts, Screws, Studs and Nuts — Symbols and Descriptions of Dimensions (GB/T 5276-2015, ISO 225:2010, MOD) GB/T 5779.1 Fasteners — Surface Discontinuities — Bolts, Screws and Studs for General Requirements (GB/T 5779.1-2000, idt ISO 6157-1:1988) GB/T 6188 Hexalobular Internal Driving Feature for Bolts and Screws (GB/T 6188-2000, idt ISO 10664:1999) GB/T 9145 General Purpose Metric Screw Threads — Limits of Sizes for the Screw Threads of Medium Quality and Preferable Plan (GB/T 9145-2003, ISO 965-2:1998, MOD) GB/T 16938 Fasteners — General Requirements for Bolts, Screws, Studs and Nuts (GB/T 16938-2008, ISO 8992:2005, IDT) 3 Types and Dimensions For types and dimensions of screws, see Figure 1and Table 1. Symbols and descriptions of dimensions are specified in GB/T 5276.

Foreword II 1 Scope 2 Normative References 3 Types and Dimensions 4 Specifications and Reference Standards 5 Designation

*GB/T 2-2016 Fasteners—Ends of parts with external thread
*GB/T 90.1-2002 Fasteners--Acceptance inspection
*GB/T 90.2-2002 Fasteners--Marking and packaging
*GB/T 193-2003 General purpose metric screw threads—General plan
*GB/T 1237-2000 Designation system for fasteners
*GB/T 3098.1-2010 Mechanical properties of fasteners—Bolts,screws and studs
*GB/T 3098.6-2014 Mechanical Properties of fasteners- Stainless steel bolts, screws and studs
*GB/T 3098.10-1993 Mechanical properties of fasteners - Bolts, scrows, studs and nuts made of non-ferrous metals
*GB/T 3103.1-2002 Essential oils and aromatic extracts - Determination of residual benzene content
*GB/T 5267.1-2002 Fasteners - Electroplated Coatings
*GB/T 5267.2-2017 Fasteners―Non-electrolytically applied zinc flake coatings
*GB/T 5267.4-2009 Passivation of corrosion-resistant stainless-steel fasteners
*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 6188-2017 Hexalobular internal driving feature for bolts and screws
*GB/T 9145-2003 General purpose metric screw threads - Limits of sizes for the screw threads of medium quality and preferable plan
*GB/T 16938-2008 Fasteners - General requirements for bolts screws studs and nuts