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GB/T 819.1-2016 English PDF (GBT819.1-2016)

GB/T 819.1-2016 English PDF (GBT819.1-2016)

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GB/T 819.1-2016: Countersunk flat head screws with cross recess -- Part 1: Property class 4.8

This Part of GB/T 819 specifies the type and dimension, technical conditions and markings of Property Class 4.8 of countersunk flat head screws with cross recess. This Part is applicable to the Type-H and Type-Z countersunk flat head screws with cross recess for Thread Specification M1.6~M10, Property Class 4.8, Product Grade A.
GB/T 819.1-2016
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 21.060.10
J 13
Replacing GB/T 819.1-2000
Countersunk Flat Head Screws with Cross Recess ?€?
Part 1. Property Class 4.8
(ISO 7046-1.2011, Countersunk Flat Head Screws (Common Head Style) with Type H or Type Z Cross Recess ?€? Product Grade A ?€? Part 1. Steel Screws of Property Class 4.8, 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 ... 5
2 Normative References ... 5
3 Dimension ... 6
4 Technical Conditions and Reference Standards ... 8
5 Markings ... 9
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 819.1-2000 Countersunk Flat Head Screws with Cross Recess ?€? Part 1. Property Class 4.8; compared with GB/T 819.1-2000, the major technical changes are as follows.
--- Delete ?€?if other technical requirements are needed, ... selection in GB/T 3098.1 and GB/T 3106?€? (Chapter 1 in 2000 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 screws (see Table 2);
This Part adopts the re-drafting method to modify and use ISO 7046-1.2011 Countersunk Flat Head Screws (Common Head Style) with Type H or Type Z Cross Recess ?€? Product Grade A ?€? Part 1. Steel Screws of Property Class 4.8 (English Edition).
The technical differences and causes between this Part and ISO 7046-1.2011 are as follows.
--- Delete ISO 7046-1 provisions. ?€?if other technical requirements are needed, ... selection in ISO 898-1 and ISO 965-2?€? (Chapter 1), which doesn?€?t belong to the contents of this Standard;
--- In the normative references, use national standards to replace the international standards (Chapter 2); add the reference of GB/T 90.2 (Table 2), GB/T 1237 (5.1); so that conform to China?€?s fastener basic standard;
--- Fail to add steel screws property class of ?€?d< 3mm, as per agreement?€? (table 2), expand the applicable scope of the standard;
--- Add the packaging technical requirements (Table 2); so that conform to China?€?s fastener basic standard;
--- Modify the marking examples into simplified marking examples (5.2); so that conform to the provisions of GB/T 1237.
This Part also has the following editorial changes.
--- Modify the standard name;
--- Delete the bibliography of ISO 7046-1.
This Part was proposed by China Machinery Industry Federation.
This Part shall be under the jurisdiction of National Technical Committee for Standardization of Fastener (SAC/TC 85).
Drafting organizations of this Part. China Productivity Center for Machinery. Participating drafting organizations of this Part. Zhejiang Tong Ming Enterprise Co., Ltd. This Part shall be interpreted by the Secretariat of National Technical Committee for Standardization of Fastener.
The historical editions replaced by this Part are as follows.
--- GB/T 819-1967, GB/T 819-1976, GB/T 819-1985, GB/T 819.1-2000.
Countersunk Flat Head Screws with Cross Recess ?€?
Part 1. Property Class 4.8
1 Scope
This Part of GB/T 819 specifies the type and dimension, technical conditions and markings of Property Class 4.8 of countersunk flat head screws with cross recess. This Part is applicable to the Type-H and Type-Z countersunk flat head screws with cross recess for Thread Specification M1.6~M10, Property Class 4.8, 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 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)

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