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GB/T 847-2017

Chinese Standard: 'GB/T 847-2017'
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusRelated Standard
GB/T 847-2017English109 Add to Cart Days<=3 Cross-recessed raised countersunk (oval) head tapping screws Valid GB/T 847-2017
GB/T 847-2017Chinese15 Add to Cart <=1-day [PDF from Chinese Authority, or Standard Committee, or Publishing House]

   

BASIC DATA
Standard ID GB/T 847-2017 (GB/T847-2017)
Description (Translated English) Cross-recessed 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 6,649
Date of Issue 2017-07-12
Date of Implementation 2018-02-01
Drafting Organization China Machine Productivity Promotion Center
Administrative Organization National Fastener Standardization Technical Committee (SAC / TC 85)
Proposing organization China Machinery Industry Federation
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China, China National Standardization Administration Committee

GB/T 847-2017
Cross-recessed raised countersunk (oval) head tapping screws
ICS 21.060.10
J13
National Standards of People's Republic of China
Replacing GB/T 847-1985
Cross recessed countersunk head self tapping screws
(ISO 7051.2011, 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 standard 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 standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 847-1985 "Cross recessed countersunk head self-tapping screws", compared with GB/T 847-1985, the main technical changes
as follows.
--- Increased R type (see Figure 1 and Table 1);
--- Increase the general technical conditions according to GB/T 16938 (see Chapter 2, Table 2);
--- Steel screws, non-treated zinc and non-electrolytic coating technology requirements according to GB/T 5267.2 (see Table 2);
--- Increase the stainless steel screw products and technical requirements (see Table 2);
--- Added "For other technical requirements or surface treatment, by the supply and demand agreement" (see Table 2).
This standard uses redrafted Law revision using ISO 7051.2011 "cross recessed half countersunk head self-tapping screws."
Technical differences from ISO 7051.2011 and their causes are as follows.
--- 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 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 standard is proposed by the China Machinery Industry Federation.
This standard by the National Standardization Technical Committee fasteners (SAC/TC85) centralized.
This standard is drafted by. Machine Productivity Promotion Center.
Participated in the drafting of this standard. Zhejiang Jingyi Standard Parts Co., Ltd..
This standard by the National Standardization Technical Committee fasteners responsible for the interpretation.
This standard replaces the standards previously issued as.
--- GB/T 847-1976, GB/T 847-1985.
Cross recessed countersunk head self tapping screws
1 Scope
This standard specifies the cross-groove semi-countersunk head tapping screws type size, technical conditions and marking.
This standard applies to thread specifications for the ST2.2 ~ ST9.5, product grade A cross recessed countersunk head self-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 944.1 screws with a cross slot (GB/T 944.1-1985, eqvISO 4757.1983)
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 3098.21 Mechanical properties of fasteners Stainless steel self-tapping screws (GB/T 3098.21-2014, ISO 3506-4.2008,
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 5267.4 Fastener surface treatment corrosion-resistant stainless steel passivation treatment (GB/T 5267.4-2009, ISO 16048.2003,
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 5279.2 Countersunk head screw Part 2. Cross recessed depth (GB/T 5279.2-1997, idtISO 7721-2.1990)
GB/T 5280 self-tapping screws (GB/T 5280-2002, idtISO 1478.1999)
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.
Related standard:   GB/T 845-2017  GB/T 846-2017
Related PDF sample:   GB/T 845-2017  GB/T 846-2017
   
 
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