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GB/T 845-2017 PDF English

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GB/T 845-2017: Cross-recessed pan head tapping screws
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Status: Valid

GB/T 845: Historical versions

Standard IDUSDBUY PDFDeliveryStandard Title (Description)Status
GB/T 845-201790 Add to Cart Auto, 9 seconds. Cross-recessed pan head tapping screws Valid
GB/T 845-198580 Add to Cart Auto, 9 seconds. Cross recessed pan head tapping screws Obsolete

Similar standards

GB/T 846   GB/T 823   GB/T 858   GB/T 847   

GB/T 845-2017: Cross-recessed pan head tapping 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/GBT845-2017
GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 21.060.10 J 13 Replacing GB/T 845-1985 Cross-Recessed Pan Head Tapping Screws (ISO 7049.2011, MOD) 十字槽盘头自攻螺钉 Issued on: JULY 12, 2017 Implemented on: FEBRUARY 1, 2018 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of PRC. 3. No action is required - Full-copy of this standard will be automatically & immediately delivered to your EMAIL address in 0~60 minutes.

Table of Contents

Foreword ... 3 1 Scope ... 5 2 Normative References ... 5 3 Type and Dimension ... 6 4 Technical Conditions and Reference Standards ... 9 5 Markings ... 9

Foreword

This Standard is one of the serial national standards of “Tapping Screws”, such series include. --- GB/T 845 Cross-Recessed Pan Head Tapping Screws; --- GB/T 846 Cross-Recessed Countersunk (Flat) Head Tapping Screws; --- GB/T 847 Cross-Recessed Raised Countersunk Head Tapping Screws; --- GB/T 2670.1 Hexalobular Socket Pan Head Tapping Screws; --- GB/T 2670.2 Hexalobular Socket Countersunk Head Tapping Screws; --- GB/T 2670.3 Hexalobular Socket Raised Countersunk (Oval) Head Tapping Screws; --- GB/T 5282 Slotted Pan Head Tapping Screws; --- GB/T 5283 Slotted Countersunk Head Tapping Screws; --- GB/T 5284 Slotted Raised Countersunk Head Tapping Screws; --- GB/T 5285 Hexagon Head Tapping Screws; --- GB/T 9456 Cross-Recessed Hexagon Head Tapping Screws with Indentation; --- GB/T 13806.2 Fasteners for Fine Mechanics – Cross-Recessed Tapping Screws – Scrape Point; --- GB/T 16824.1 Hexagon Head Tapping Screws with Collar; --- GB/T 16824.2 Hexagon Flange Head Tapping Screws. This Standard was drafted as per the rules specified in GB/T 1.1-2009. This Standard replaced GB/T 845-1985 Cross-Recessed Pan Head Tapping Screws; compared with GB/T 845-1985, this Standard has the major technical changes as follows. --- Increased Type-R (see Figure 1 and Table 1); --- Add general technical conditions as per GB/T 16938 (see Clause 2, Table 2); --- For steel screws, add the untreated and non-electrolytically applied zinc flake coating technical requirements as per GB/T 5267.2 (see Table 2); Cross-Recessed Pan Head Tapping Screws

1 Scope

This Standard specifies the type and dimension, technical conditions and marking of cross-recessed pan head tapping screws. This Standard is applicable to the cross-recessed pan head tapping screws with Thread Specification of ST 2.2 ~ ST 9.5, and 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, idt ISO 3269.2000) GB/T 90.2 Fasteners – Marking and Packaging 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 3098.5 Mechanical Properties of Fasteners -Tapping Screws (GB/T 3098.5- 2016, ISO 2702.2011, MOD) GB/T 3098.21 Mechanical Properties of Fasteners – Stainless Steel Tapping Screws (GB/T 3098.21-2014, ISO 3506-4.2008, 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) GB/T 5267.2 Fasteners – Non-Electrolytically Applied Zinc Flake Coatings (GB/T 5267.2-2002, ISO 10683.2000, IDT) ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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