GB/T 6175-2016 Hexagon nuts, style 2
1 Scope
This standard specifies the types, dimensions, technical specifications, and designation of style 2 hexagon nuts.
This standard is applicable to style 2 hexagon nuts with thread specifications M5 to M36, performance grades 10 and 12, and product grades A and B, with product grade A for threads D ≤ M16 and product grade B for threads D > M16.
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 90.1 Fasteners - Acceptance inspection (GB/T 90.1-2002, ISO 3269: 2000, IDT)
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 3098.2 Mechanical properties of fasteners - Nuts (GB/T 3098.2-2015, ISO 898-2: 2012, MOD)
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 5267.3 Fasteners - Hot dip galvanized coatings (GB/T 5267.3-2008, ISO 10684: 2004, 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 5779.2 Fasteners - Surface discontinuities - Nuts (GB/T 5779.2-2000, idt ISO 6157-2: 1995)
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 Dimensions
See Figure 1 and Table 1 for the types and dimensions of nuts.
Symbols and descriptions of dimensions are specified in GB/T 5276.
a When the washer face type is required, it shall be indicated in the order;
b β=15° to 30°;
c θ=90° to 120°.
Figure 1
Foreword i
1 Scope
2 Normative references
3 Dimensions
4 Technical specifications and referenced standards
5 Designation
