GB/T 6187.2-2016 English PDF (GBT6187.2-2016)

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 - fine pitch thread.

GB/T 6187.2-2016
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 21.060.20
J 13
Replacing GB/T 6187.2-2000
Prevailing Torque Type All-metal Hexagon Nuts
with Flange, Style 2 – Fine Pitch Thread
[ISO 12126.2012, Prevailing Torque Type All-metal Hexagon Nuts with Flange with Metric Fine Pitch Thread, Style 2 – Product Grades A and B, MOD]
ISSUED ON. FEBRUARY 24, 2016
IMPLEMENTED ON. JUNE 1, 2016
Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative References ... 6
3 Dimensions ... 7
4 Technical Requirements and Reference Standards ... 9
5 Designation ... 10
Annex A (Normative) Gauging of Hexagon Nuts with Flange ... 11
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 2nd 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 6187.2-2000, Prevailing Torque Type All-metal Hexagon Nuts with Flange – Fine Pitch Thread. Compared with GB/T 6187.2-2000, 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 The following editorial modification is made in this Part.
-- it changes the name of the standard.
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 edition replaced by this Part is as follows.
-- GB/T 6187.2-2000.
Prevailing Torque Type All-metal Hexagon Nuts
with Flange, Style 2 – Fine Pitch Thread
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 – fine pitch thread.
This Part applies to prevailing torque type all-metal hexagon nuts, style 2, with thread nominal diameter 8 mm to 20 mm, fine pitch thread, property class 6, 8 and 10 and of product grades A and B. 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 6177.2 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.