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GB/T 2670.2-2017Hexalobular socket countersunk head tapping screws (English PDF)

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Issued by

AQSIQ; SAC

Level / Type

National · Recommended

Issue date

July 12, 2017

Implementation date

February 1, 2018

Scope

GB/T 2670.2-2017 (Hexalobular socket countersunk head tapping screws) is available as an English-translated PDF.

GB/T 2670.2-2017 — This Part of GB/T 2670 specifies the type and dimension, technical conditions, and marking of hexalobular socket countersunk head tapping screws. This Part is applicable to the hexalobular socket countersunk head tapping screws with Thread Specification of ST 2.9 ~ ST 6.3, Product Grade A.

Document preview — GB/T 2670.2-2017

National Standard of the People's Republic of China

Issued by: AQSIQ; SAC

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

Foreword

This Part is one of the serial national standards of "Tapping Screws", which include.

--- GB/T 845 Cross Recessed Pan Head Tapping Screws;

--- GB/T 846 Cross Recessed Countersunk Head Tapping Screws;

--- GB/T 847 Cross Recessed Raised Countersunk Head Tapping Screws;

--- GB/T 2670.1 Hexalobular Socket Pan Head Tapping Screws;

--- GB/T 2670.2 Hexalobular Socket Countersunk Head Tapping Screws;

--- GB/T 2670.3 Hexalobular Socket Raised Countersunk (Oval) Head Tapping

Screws;

--- GB/T 5282 Slotted Pan Head Tapping Screws;

--- GB/T 5283 Slotted Countersunk Head Tapping Screws;

--- GB/T 5284 Slotted Raised Countersunk Head Tapping Screws;

--- GB/T 5285 Hexagon Head Tapping Screws;

--- GB/T 9456 Cross Recessed Hexagon Head Tapping Screws with Indentation;

--- GB/T 13806.2 For Fine Mechanics Cross Recessed Tapping Screws - Scrape

Point;

--- GB/T 16824.1 Hexagon Washer Head Tapping Screws;

--- GB/T 16824.2 Hexagon Flange Head Tapping Screws.

This Part belongs to Part 2 of GB/T 2670.

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

This Part replaced GB/T 2670.2-2004 Hexalobular Socket Countersunk Head Tapping

Screws; compared with GB/T 2670.2-2004, this Part has the major technical changes

as follows.

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

3098.5 and GB/T 3103.1)." (see Clause 1 of 2004 Edition);

--- Add the general technical conditions as per GB/T 16938 (see Table 2 of this

Edition);

Hexalobular Socket

Countersunk Head Tapping Screws

1 Scope

This Part of GB/T 2670 specifies the type and dimension, technical conditions, and

marking of hexalobular socket countersunk head tapping screws.

This Part is applicable to the hexalobular socket countersunk head tapping screws with

Thread Specification of ST 2.9 ~ ST 6.3, Product Grade A.

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, idt ISO

3269.2000)

GB/T 90.2 Fasteners - Marking and Packaging

GB/T 1237 Designation System for Fasteners (GB/T 1237-2000, eqv ISO

8991.1986)

GB/T 3098.5 Mechanical Properties of Fasteners - Tapping Screws (GB/T 3098.5-

2016, ISO 2702.2011, MOD)

GB/T 3103.1 Tolerances for Fasteners - Bolts, Screws 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 5276 Fasteners - Bolts, Screws, Studs and Nuts - Symbols and Descriptions

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

......

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

Referenced standards

Normative references

GB/T 1237 · GB/T 1237-2000 · GB/T 3098.5 · ISO 2702.2011 · GB/T 3103.1 · ISO 4759 · GB/T 5267.1 · GB/T 5267.1-2002 · GB/T 5267.2 · ISO 10683.2000 · GB/T 5276 · GB/T 5276-2015 · ISO 225.2010

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