GB/T 28272-2012 English PDF

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GB/T 28272-2012: Metric screw threads with extra fine pitch -- Series and basic dimensions
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 28272-2012	329	Add to Cart	3 days	Metric screw threads with extra fine pitch -- Series and basic dimensions	Valid

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Basic data

Standard ID: GB/T 28272-2012 (GB/T28272-2012)
Description (Translated English): Metric screw threads with extra fine pitch -- Series and basic dimensions
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J04
Classification of International Standard: 21.040.10
Word Count Estimation: 14,170
Quoted Standard: GB/T 192; GB/T 14791
Regulation (derived from): National Standards Bulletin No. 9 of 2012
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the metric fine pitch thread basic tooth type, diameter and pitch series and basic dimensions. This standard applies to precision instruments and electronic equipment and other fields of threaded connections.

GB/T 28272-2012: Metric screw threads with extra fine pitch -- Series and basic dimensions

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS21.040.10 J04 National Standards of People's Republic of China Metric series of ultra-fine thread and basic dimensions Issued on. 2012-05-11 2012-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

Superfine metric thread standards include. --- GB/T 28271-2012 "metric superfine thread tolerance"; --- GB/T 28272-2012 "ultra-fine thread metric series and basic dimensions." The standard metric superfine thread series and their basic dimensions. It is the basis for the establishment of ultra-fine metric thread tolerance standards. This standard rule according to GB/T 1.1-2009 given draft. This standard by the National Standardization Technical Committee thread (SAC/TC108) and focal points. This standard is drafted by. National Standard of product quality supervision and inspection center, the machine Productivity Promotion Center. Participated in the drafting of this standard. Chengdu Ai Litas thread Tools Co., Ltd., Ningbo Kowloon Fastener Manufacturing Co., Ltd. The main drafters of this standard. Wang Wei, Li Xiaobin, Lee Seng Wee, Xu Yong, Wang Feilong. Metric series of ultra-fine thread and basic dimensions

1 Scope

This standard specifies the basic model tooth Metric superfine thread diameter and pitch range and basic dimensions. This standard applies to the field of precision instruments and electronic equipment such as a threaded connection.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated edition applies to this article Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 192 ordinary screw threads - Basic model GB/T 14791 term thread 3 Terms, definitions and code 3.1 Terms and Definitions Terms and definitions GB/T 14791 defined apply to this document. 3.2 Code The following codes apply to this document. D --- basic large diameter internal thread (nominal diameter); Basic large diameter d --- external thread (nominal diameter); Basic pitch diameter D2 --- internal threads; d2 --- basic diameter external thread; D1 --- basic trail internal threads; d1 --- basic path external thread; H --- original height triangle; P --- pitch.

4 Basic tooth type

Metric same basic tooth superfine thread common thread type and shall comply with the provisions of GB/T 192's.

5 diameter and pitch of the standard series

Metric superfine thread diameter and pitch of the standard series combination should meet the requirements of Table 1. In Table 1, the diameter should be selected in the same row of the pitch. Preferred diameter of the first series, the second series followed select diameter, the diameter of the final choice of the third series. ......

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