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GB/T 819.2-2016 PDF English

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GB/T 819.2-2016: Countersunk flat head screws with cross recess -- Part 2: Property class 8.8, stainless steel screws and non-ferrous metal screws
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GB/T 819.2: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] deliveryName of Chinese StandardStatus
GB/T 819.2-2016English90 Add to Cart 0-9 seconds. Auto-delivery Countersunk flat head screws with cross recess -- Part 2: Property class 8.8, stainless steel screws and non-ferrous metal screws Valid
GB/T 819.2-1997English70 Add to Cart 0-9 seconds. Auto-delivery Cross recessed countersunk flat head screws(common head style) - Grade A - Part 2: Steel of property class 8 - 8, stainless and non-ferrous metals Obsolete

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GB/T 819.2-2016: Countersunk flat head screws with cross recess -- Part 2: Property class 8.8, stainless steel screws and non-ferrous metal screws


---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT819.2-2016
GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 21.060.10 J 13 Replacing GB/T 819.2-1997 Countersunk Flat Head Screws with Cross Recess – Part 2. Property Class 8.8, Stainless Steel Screws and Non-Ferrous Metal Screws [ISO 7046-2.2011, Countersunk Flat Head Screws (Common Head Style) with Type H or Type Z Cross Recess – Product Grade A – Part 2. Steel Screws of Property Class 8.8, Stainless Steel Screws and Non-Ferrous Metal Screws, MOD] Issued on: FEBRUARY 24, 2016 Implemented on: JUNE 1, 2016 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of PRC.

Table of Contents

Foreword ... 3 1 Scope ... 6 2 Normative References ... 6 3 Dimension ... 7 4 Technical Conditions and Reference Standards ... 10 5 Markings ... 11

Foreword

This Part is one of the serial national standards of “Slotted Screws and Cross Recess Screws”, such series include. --- GB/T 65 Slotted Cheese Head Screws; --- GB/T 67 Slotted Pan Head Screws; --- GB/T 68 Slotted Countersunk Flat Head Screws; --- GB/T 69 Slotted Raised Countersunk Head Screws; --- GB/T 818 Pan Head Screws with Cross Recess; --- GB/T 819.1 Countersunk Flat Head Screws with Cross Recess – Part 1. Property Class 4.8; --- GB/T 819.2 Countersunk Flat Head Screws with Cross Recess – Part 2. Property Class 8.8, Stainless Steel Screws and Non-Ferrous Metal Screws; --- GB/T 820 Raised Countersunk Head Screws with Cross Recess; --- GB/T 822 Cross Recessed Cheese Head Screws; --- GB/T 823 Cross Recessed Small Pan Head Screws; --- GB/T 13806.1 Fasteners for Fine Mechanics - Cross Recessed Screws. This Part was drafted as per the rules specified in GB/T 1.1-2009. This Part replaced GB/T 819.2-1997 Countersunk Flat Head Screws with Cross Recess – Part 2. Steel Property Class 8.8, Stainless Steel A2-70 and Non-Ferrous Metal CU2 or CU3; compared with GB/T 819.2-1997, the major technical changes are as follows. --- Delete “if under special conditions, the technical conditions specified beyond this Standard, ... GB 3106 and GB 9145” (Chapter 1 of 1997 Edition); --- Unify the reference thread standards into GB/T 193, GB/T 9145 (see Chapter 2); --- add “d< 3mm, as per agreement” to the property class of steel and non-ferrous metal screws (see Table 2); --- Add the steel screws non--electrolytically applied zinc flake coating technical requirements as per GB/T 5267.2 (see Table 2); --- Add the stainless-steel screws passivation treatment technical requirements as Countersunk Flat Head Screws with Cross Recess – Part 2. Property Class 8.8, Stainless Steel Screws and Non-Ferrous Metal Screws

1 Scope

This Part of GB/T 819 specifies the type and dimension, technical conditions and markings of stainless steel and non-ferrous metal countersunk flat head screws with cross recess and property class 8.8. This Part is applicable to Type-H and Type-Z countersunk flat head screws with cross recess for Thread Specification M2~M10, Property Class 8.8, A2-70, CU2, CU3, 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, 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 944.1 Cross Recesses for Screws (GB/T 944.1-1985, eqv ISO 4757.1983) GB/T 1237 Designation System for Fasteners (GB/T 1237-2000, eqv ISO 8991.1986) GB/T 3098.1 Mechanical Properties of Fasteners - Bolts, Screws and Studs (GB/T 3098.1-2010, ISO 898-1.2009, MOD) GB/T 3098.6 Mechanical Properties of Fasteners – Stainless Steel Bolts, Screws and Studs (GB/T 3098.6-2014, ISO 3506-1.2009, MOD) GB/T 3098.10 Mechanical Properties of Fasteners –Bolts, Screws and Studs Made of Non-Ferrous Metals (GB/T 3908.10-1993, eqv ISO 8839.1986) 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 5267.4 Passivation of Corrosion – Resistant Stainless – Steel Fasteners (GB/T 5267.4-2009, ISO 16048.2003, IDT) GB/T 5276 Fasteners - Bolts, Screws, Studs and Nuts - Symbols and Descriptions of Dimensions (GB/T 5276-2015, ISO 225.2010, MOD) GB/T 5279 Countersunk Head Screws - Head Configuration and Gauging (GB/T 5279-1985, idt ISO 7721.1983) GB/T 5279.2 Countersunk Flat Head Screws - Part 2. Penetration Depth of Cross Recesses (GB/T 5279.2-1997, idt ISO 7721-2.1990) GB/T 5779.1 Fastener – Surface Discontinues – Bolts, Screws and Studs for General Requirements (GB/T 5779.1-2000, idt ISO 6157-1.1988) 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 Dimension

The type and dimension of screws can refer to Figure 1 and Table 1. The dimension codes and markings shall conform to GB/T 5276. The shank diameter of the part without thread equals to the medium diameter of thread or allows equaling to the large diameter of thread. Screw GB/T 819.2 M5×20 If insert depth series are needed to designate, the type and series number of cross recess shall be indicated in the marking, e.g.. Type-H, Series 1. Screw GB/T 819.2 M5×20 H1 ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.


      

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