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GB/T 6173-2015Hexagon thin nuts -- Fine pitch thread (English PDF)

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Issued by

General Administration of Quality Supervision, Inspection and Quarantine

Level / Type

National · Recommended

Issue date

December 31, 2015

Implementation date

April 1, 2016

Scope

GB/T 6173-2015 (Hexagon thin nuts -- Fine pitch thread) is available as an English-translated PDF.

GB/T 6173-2015 — This Standard specifies the type and dimension, technical conditions and markings of hexagon thin nuts – fine pitch thread.

This Standard is applicable to the chamfered hexagon thin nuts – fine pitch thread with thread nominal diameter D = 8mm~64mm; Performance Grades 04, 05, A2-025, A2- 035, A4-025, A4-035, CU2, CU3 and AL4; Product Grades A and B. Grade A is applied to the nuts with D<=16mm; while Grade B is applied to the nuts with D >16mm.

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Document preview — GB/T 6173-2015

National Standard of the People's Republic of China

ICS: 21.060.20
Classification: J 13

Issued by: General Administration of Quality Supervision, Inspection and Quarantine

Foreword...3
1 Scope...5
2 Normative References...5
3 Dimension...6
4 Technical Conditions and Reference Standards...7
5 Markings...8

Foreword

GB/T 6173 is one of the serial national standards of "Hexagon Nuts (Part)", which

include.

--- GB/T 41 Hexagon Nuts, Style 1 – Product Grade C;

--- GB/T 6170 Hexagon Nuts, Style 1;

--- GB/T 6171 Hexagon Nuts, Style 1 – Fine Pitch Thread;

--- GB/T 6172.1 Hexagon Thin Nuts;

--- GB/T 6173 Hexagon Thin Nuts – Fine Pitch Thread;

--- GB/T 6174 Hexagon Thin Nuts – Unchamfered;

--- GB/T 6175 Hexagon Nuts, Style 2;

--- GB/T 6176 Hexagon Nuts, Style 2 – Fine Pitch Thread.

This Standard was drafted as per the rules specified in GB/T 1.1-2009.

This Standard replaced GB/T 6173-2000 Hexagon Thin Nuts – Fine Pitch Thread;

compared with GB/T 6173-2000, this Standard mainly has the following technical

changes.

--- Delete "if other technical requirements are needed,... the selection in (GB/T

3098.15 and GB/T 3103.1)." (Chapter 1 of Edition 2000);

--- Unify the reference thread standards to be GB/T 193, GB/T 9145 (Chapter 2);

--- Modify the inner chamfer into theta=110°~120° (Figure 1);

--- Increase the mechanical properties of steel nuts. QT – Quenching and Tempering

(Table 3).

This Standard adopts re-drafting method to modify and use ISO 8675.2012 Hexagon

Thin Nuts Chamfered (Style 0) with Metric Fine Pitch Thread – Product Grades A and

B (English Edition).

This Standard has the following technical differences and causes from ISO 8675. 2012.

--- Delete ISO 8675 provision. "if other technical requirements are needed,...

selection in ISO 4759-1" (Chapter 1), which don't belong to the contents specified

by this Standard;

--- In the normative references, use national standards to replace the international

Hexagon Thin Nuts – Fine Pitch Thread

1 Scope

This Standard specifies the type and dimension, technical conditions and markings of

hexagon thin nuts – fine pitch thread.

This Standard is applicable to the chamfered hexagon thin nuts – fine pitch thread with

thread nominal diameter D = 8mm~64mm; Performance Grades 04, 05, A2-025, A2-

035, A4-025, A4-035, CU2, CU3 and AL4; Product Grades A and B. Grade A is applied

to the nuts with D<=16mm; while Grade B is applied to the nuts with D >16mm.

2 Normative References

The following documents are essential to the application of this document. For the

dated documents, only the versions with the dates indicated are applicable to this

document; for the undated documents, only the latest version (including all the

amendments) are applicable to this document.

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 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 3098.10 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 3098.15 Mechanical Properties of Fasteners – Nuts Made of Stainless Steel

(GB/T 3098.15-2014, ISO 3506-2.2009, MOD)

GB/T 3103.1 Tolerances for Fasteners – Bolts, Screws and Nuts (GB/T 3103.1-

2002, idt ISO 4759-1.2000)

......

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 8 pages — is available in the English PDF.

Referenced standards

Normative references

ISO 3269.2000 · GB/T 193 · ISO 261.1998 · ISO 8839.1986 · ISO 3506 · GB/T 3103.1 · ISO 4759

Cited by

GB/T 17116.3-2018Pipe supports and hangers - Part 3: Middle connection attachments and building structure attachments

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