GB/T 6187.1-2016Prevailing torque type all-metal hexagon nuts with flange, style 2 (English PDF)

Foreword

This Part of GB/T 6187 belongs to a complete group of national standards "Prevailing

Torque Type Hexagon Nuts". It comprises the following.

-- GB/T 889.1 Prevailing Torque Type Hexagon Nuts (with Non-metallic Insert),

Style 1

-- GB/T 889.2 Prevailing Torque Type Hexagon Nuts (with Non-metallic Insert),

Style 1--Fine Pitch Thread

-- GB/T 6172.2 Prevailing Torque Type Hexagon Thin Nuts (with Non-metallic

Insert)

-- GB/T 6182 Prevailing Torque Type Hexagon Nuts (with Non-metallic Insert),

Style 2

-- GB/T 6183.1 Prevailing Torque Type Hexagon Nuts with Flange (with Non-

metallic Insert), Style 2

-- GB/T 6183.2 Prevailing Torque Type Hexagon Nuts with Flange (with Non-

metallic Insert), Style 2 – Fine Pitch Thread

-- GB/T 6184 Prevailing Torque Type All-metal Hexagon Nuts, Style 1

-- GB/T 6185.1 Prevailing Torque Type Hexagon Nuts With Flange (with Non-

metallic Insert), Style 2

-- GB/T 6185.2 Prevailing Torque Type All-metal Hexagon Nuts with Flange, Style

2 – Fine Pitch Thread

-- GB/T 6187.1 Prevailing Torque Type All-metal Hexagon Nuts with Flange,

Style 2

-- GB/T 6187.2 Prevailing Torque Type All-metal Hexagon Nuts with Flange,

Style 2 – Fine Pitch Thread

This Part is the 1st Part of GB/T 6187.

This Part was drafted in accordance with the rules given in GB/T 1.1-2009.

This Part replaces GB/T 6187.1-2000, Prevailing Torque Type All-metal Hexagon Nuts

with Flange. Compared with GB/T 6187.1-2000, the main technical differences are as

follows.

-- it changes the name of the standard;

-- it deletes "If, in special cases, specifications other than those listed in this

-- it changes the name of the standard; and

-- it deletes the Bibliography of ISO 7044.

This Part was proposed by China Machinery Industry Federation.

This Standard shall be under the jurisdiction of the National Standardization Technical

Committee on Fasteners (SAC/TC 85).

The responsible drafting organization of this Part. China Productivity Center for

Machinery.

The participating drafting organization of this Part. Dongfeng Commercial Vehicles Co

Ltd. Dongfeng Commercial Vehicles Technology Centre.

This Part shall be interpreted by the Secretariat of National Standardization Technical

Committee on Fasteners.

The previous editions replaced by this Part are as follows.

-- GB/T 6187-1986; and

-- GB/T 6187.1-2000.

Prevailing Torque Type All-metal Hexagon Nuts

with Flange, Style 2

1 Scope

This Part of GB/T 6187 specifies the dimensions, technical requirements and

designation of prevailing torque type all-metal hexagon nuts with flange, style 2.

This Part applies to prevailing torque type all-metal hexagon nuts, style 2, product

grades A and B, with thread M5 to M20, and of property class 8, 10 and 12. Product

grade A is used for nuts with D <= 16 mm; and product grade B is used for nuts with D >

16 mm.

Note. The dimensions of the nuts correspond to those given in GB/T 6177.1 plus prevailing

torque feature.

2 Normative References

The following referenced documents are indispensable for the application of this

document. For dated references, only the edition dated applies to this document. For

undated references, the latest edition of the referenced document (including any

amendments) applies to this Standard.

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 – Diameters and Pitches (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 3098.9 Mechanical Properties of Fasteners – Prevailing Torque Type Steel

Nuts (GB/T 3098.9-2010, ISO 2320.2008, IDT)

GB/T 3103.1 Essential Oils and Aromatic Extracts – Determination of Residual

Benzene Content (GB/T 3103.1-2002, ISO 4759-1.2000, IDT)

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 5276 Fasteners – Bolts, Screws, Studs and Nuts – Symbols and Description

of Dimensions (GB/T 5276-2015, ISO 225.2010, MOD)

GB/T 5779.2 Fasteners - Surface Discontinuities – Nuts (GB/T 5779.2-2000, ISO

6157-2.1995, IDT)

GB/T 6177.2 Hexagon Nuts with Flange, Style 2 – Fine Pitch Thread (GB/T

6177.2-2016, ISO 10663.2012, MOD)

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 dimensions of nuts.

Symbols and descriptions of dimensions are specified in GB/T 5276.

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