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GB/T 2670.3-2017 English PDF

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GB/T 2670.3-2017: Hexalobular socket raised countersunk (oval) head tapping screws
Status: Valid

GB/T 2670.3: Historical versions

Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
GB/T 2670.3-2017119 Add to Cart 3 days Hexalobular socket raised countersunk (oval) head tapping screws Valid
GB/T 2670.3-2004239 Add to Cart 3 days Hexalobular socket raised countersunk (oval) head tapping screws Obsolete

Similar standards

GB/T 2673.2   GB/T 2672   GB/T 2670.2   GB/T 2673.1   GB/T 2670.1   

Basic data

Standard ID: GB/T 2670.3-2017 (GB/T2670.3-2017)
Description (Translated English): Hexalobular socket raised countersunk (oval) head tapping screws
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J13
Classification of International Standard: 21.060.10
Word Count Estimation: 6,624
Date of Issue: 2017-07-12
Date of Implementation: 2018-02-01
Older Standard (superseded by this standard): GB/T 2670.3-2004
Quoted Standard: GB/T 90.1; GB/T 90.2; GB/T 1237; GB/T 3098.5; GB/T 3103.1; GB/T 5267.1; GB/T 5267.2; GB/T 5276; GB/T 5279; GB/T 5280; GB/T 6188; GB/T 16938
Adopted Standard: ISO 14587-2011, MOD
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the type, technical condition and marking of the hexagon socket head screw. This standard applies to the thread size ST 2.9 ~ ST 6.3, the product level for the A-level hexagonal flower-shaped semi-countersunk head tapping screws.

GB/T 2670.3-2017: Hexalobular socket raised countersunk (oval) head tapping screws

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Hexalobular socket raised countersunk (oval) head tapping screws ICS 21.060.10 J13 National Standards of People's Republic of China Replacing GB/T 2670.3-2004 Hexagonal flower-shaped semi-countersunk head self-tapping screws (ISO 14587.2011, MOD) 2017-07-12 Posted 2018-02-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released

Foreword

This section is "self-tapping screws" one of the national standards. This series includes. --- GB/T 845 cross pan head self-tapping screws; --- GB/T 846 countersunk countersunk head self-tapping screws; --- GB/T 847 cross recessed countersunk head self-tapping screws; --- GB/T 2670.1 hexagonal flower-shaped pan head tapping screws; --- GB/T 2670.2 hexagonal flower-shaped countersunk head self-tapping screws; --- GB/T 2670.3 hexagonal flower-shaped semi-countersunk head self-tapping screws; --- GB/T 5282 slotted plate self-tapping screws; --- GB/T 5283 Slotted countersunk head tapping screws; --- GB/T 5284 Slotted semi-countersunk head self-tapping screws; --- GB/T 5285 hex head self-tapping screws; --- GB/T 9456 cross recessed hexagonal head self-tapping screws; --- GB/T 13806.2 precision machinery fasteners cross-slotted tapping screw scraping end; --- GB/T 16824.1 Hex flange self-tapping screws; --- GB/T 16824.2 Hex flange self tapping screws. This section GB/T 2670 Part 3. This section drafted in accordance with GB/T 1.1-2009 given rules. This section instead of GB/T 2670.3-2004 "hexagonal flower-head semi-countersunk head tapping screws", compared with GB/T 2670.3-2004, the main Technical changes are as follows. --- Delete "for other technical requirements, GB/T 3098.5 and GB/T 3103.1)" (see.2004 edition of the first 1 chapter); --- Increase the general technical conditions according to GB/T 16938 (see Table 2); --- Increase non-electrolytic zinc coating technology requirements according to GB/T 5267.2, and "For other technical requirements or surface treatment, should be supply and demand Agreement "(see Table 2). This section uses the redrafted law to amend the use of ISO 14587.2011 "hexagonal flower-head semi-countersunk head tapping screws." Technical differences from ISO 14587.2011 and the reasons for this are as follows. --- Deleted ISO 14587 regulation "For other technical requirements, ISO 4759-1 choose." (See Chapter 1), does not belong to the standard Quasi-prescribed content; --- Normative references, with our standard instead of international standards (see Chapter 2), increase the reference GB/T 90.2 (see Table 2) and GB/T 1237 (see 5.1), in line with China's basic standards fasteners; --- Increase the general technical conditions according to GB/T 16938 (see Table 2) to meet the self-tapping screw standard development requirements; --- Increase packaging technology requirements (see Table 2), in line with China's basic standards fasteners; --- Modify the mark example To simplify the mark example (see 5.2), to comply with the provisions of GB/T 1237. This part is proposed by China Machinery Industry Federation. This part of the National Standardization Technical Committee fasteners (SAC/TC85) centralized. This section is responsible for the drafting unit. Machine Productivity Promotion Center. This section participates in the drafting unit. Machinery Industry General Parts Product Quality Supervision and Testing Center. This part of the National Standardization Technical Committee fasteners responsible for the interpretation. This part replaces the standards previously issued as. --- GB/T 2670.3-2004. Hexagonal flower-shaped semi-countersunk head self-tapping screws

1 Scope

GB/T 2670 provisions of this part of the hexagonal flower-head semi-countersunk tapping screws type size, technical conditions and marking. This section applies to thread specification ST2.9 ~ ST6.3, product grade A-level hexagonal flower-shaped countersunk head tapping screws.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 90.1 fastener inspection (GB/T 90.1-2002, idtISO 3269.2000) GB/T 90.2 Fasteners signs and packaging GB/T 1237 fastener marking method (GB/T 1237-2000, eqvISO 8991.1986) GB/T 3098.5 mechanical properties of fasteners Self-tapping screws (GB/T 3098.5-2016, ISO 2702.2011, MOD) GB/T 3103.1 Fasteners Tolerances Bolts, screws, studs and nuts (GB/T 3103.1-2002, idtISO 4759-1.2000) GB/T 5267.1 fastener plating (GB/T 5267.1-2002, ISO 4042.1999, IDT) GB/T 5267.2 fasteners non-electrolytic zinc coating (GB/T 5267.2-2002, ISO 10683.2000, IDT) GB/T 5276 Fasteners - Bolts, screws, studs and nuts Dimensions Code and Notations (GB/T 5276-2015, ISO 225. 2010, MOD) GB/T 5279 countersunk head screw head shape and measurement (GB/T 5279-1985, idtISO 7721.1983) GB/T 5280 self-tapping screws (GB/T 5280-2002, idtISO 1478.1999) GB/T 6188 Bolts and screws with hexagonal flowers (GB/T 6188-2000, idtISO 10664.1999) GB/T 16938 General requirements for fasteners bolts, screws, studs and nuts (GB/T 16938-2008, ISO 8992. 2005, IDT)

3 type size

Self-tapping screw type size shown in Figure 1 and Table 1. Size code and label should be consistent with GB/T 5276.
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