Standard No.:	GB/T 819.1-2016
Chinese Name:	十字槽沉头螺钉 第1部分：4.8级
English Name:	Countersunk flat head screws with cross recess—Part 1: Property class 4.8
Professional Classification:	J13 Fastener
ICS Classification:	21.060.10
Issued by:
Issued on:	2016-02-24
Implemented on:	2016-06-01
Status:	VALID
Replace:	GB/T819.1-2000 Countersunk flat head screws (common head style) with cross-Part 1:Steel of property class 4.8
Language:	English
File Format:	PDF
Word Count:	4000 words
Price(USD):	120 (USD)
Delivery:	via email in 1-3 business day

1 Scope

This part of GB/T 819 specifies the type dimensions, requirements and designation of countersunk flat head screws with cross recess and property class 4.8.

This part is applicable to countersunk flat head screws with type H or Z cross recess and with thread of M1.6~M10, property class of 4.8 and product grade of A.

2 Normative References

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.

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 Metric Screw Threads - General Plan (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, Studs 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 5276 Fasteners; Bolts, Screws, Studs and Nuts; Symbols and Designations 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 Fasteners - Surface Discontinuities - 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 Blots, Screws, Studs and Nuts (GB/T 16938-2008, ISO 8992:2005, IDT)

3 Dimensions

See Figure 1 and Table 1.

Symbols and descriptions of dimensions shall meet those specified in GB/T 5276.

下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件,仅注日期的版本适用于本文件。凡是不注日期的引用文件,其最新版本(包括所有的修改单)适用于本文件。
GB/T90.1 紧固件 验收检查(GB/T90.1—2002,ISO3269:2000,IDT)
GB/T90.2 紧固件 标志与包装
GB/T193 普通螺纹 直径与螺距系列(GB/T193-2003,ISO261:1998,MOD)
GB/T944.1 螺钉用十字槽(GB/T944.1-1985,eqvISO4757:1983)
GB/T1237 紧固件标记方法(GB/T1237-2000,eqvISO8991:1986)
GB/T3098.1 紧 固 件 机 械 性 能 螺 栓、螺 钉 和 螺 柱 (GB/T3098.1—2010,ISO898-1:2009,MOD)
GB/T3103.1 紧固件公差 螺栓、螺钉、螺柱和螺母(GB/T3103.1-2002,idtISO4759-1:2000)
GB/T5267.1 紧固件 电镀层(GB/T5267.1—2002,ISO4042:1999,IDT)
GB/T5276 紧固件 螺栓、螺钉、螺柱及螺母 尺寸代号和标注(GB/T5276—2015,ISO225:2010,MOD)
GB/T5279 沉头螺钉 头部形状和测量(GB/T5279—1985,idtISO7721:1983)
GB/T5279.2 沉头螺钉 第2部分:十字槽插入深度(GB/T5279.2—1997,idtISO7721-2:1990)
GB/T5779.1 紧固件表面缺陷 螺栓、螺钉和螺柱 一般要求(GB/T5779.1—2000,idtISO6157-1:1988)
GB/T9145 普通螺纹 中等精度、优选系列的极限尺寸(GB/T9145—2003,ISO965-2:1998,MOD)
GB/T16938 紧固件 螺栓、螺钉、螺柱和螺母 通用技术条件(GB/T16938—2008,ISO8992:2005,IDT)