Hexagon Socket Head Cap Screws — Fine Pitch Thread
1 Scope
This part of GB/T 70 specifies the types and dimensions, specifications and designations of hexagon socket head cap screws with fine pitch thread.
This part is applicable to the hexagon socket head cap screws with fine pitch thread with nominal thread diameters, d, from 8 mm up to 36 mm, with property classes 8.8, 10.9, 12.9/12.9, A2-50, A2-70, A3-50, A3-70, A4-50, A4-70, A5-50, A5-70, CU2 and CU3 and product grade A.
For approximate masses of screws, see Annex A.
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 70.5 Gauging of Hexagon Sockets (GB/T 70.5-2008, ISO 23429:2004, IDT)
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 2516 General Purpose Metric Screw Threads — Limit Deviations (GB/T 2516-2003, ISO 965-3:1998, MOD)
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 5267.2-2017, ISO 10683:2014, MOD)
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 5779.3 Fasteners — Surface Discontinuities — Bolts, Screws and Studs for Special Requirements (GB/T 5779.3-2000, idt ISO 6157-3:1988)
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)
