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GB/T 15756-2008: General purpose metric screw threads -- Limits of sizes
Status: Valid GB/T 15756: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 15756-2008 | English | 1979 |
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13 days [Need to translate]
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General purpose metric screw threads -- Limits of sizes
| Valid |
GB/T 15756-2008
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| GB/T 15756-1995 | English | RFQ |
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14 days [Need to translate]
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Limits of size for general purpose screw threads
| Obsolete |
GB/T 15756-1995
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PDF similar to GB/T 15756-2008
Basic data | Standard ID | GB/T 15756-2008 (GB/T15756-2008) | | Description (Translated English) | General purpose metric screw threads -- Limits of sizes | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J04 | | Classification of International Standard | 21.040.10 | | Word Count Estimation | 90,922 | | Date of Issue | 2008-07-30 | | Date of Implementation | 2009-02-01 | | Older Standard (superseded by this standard) | GB/T 15756-1995 | | Quoted Standard | GB/T 192-2003; GB/T 193-2003; GB/T 197-2003; GB/T 14791 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.12 (Total No.125) | | 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 limits of the size of ordinary thread. Type in line with the common thread of basic dental GB/T 192-2003 " common thread of basic dental pattern " requirement. This standard applies to the nominal diameter of 1 mm ~ 300 mm, tolerance band of 4H, 5H, 6H, 7H, 6G, 4h, 6h, 6g, 6f and 6e is the common thread used. | GB/T 15756-2008: General purpose metric screw threads -- Limits of sizes---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.
General purpose metric screw threads. Limits of sizes
ICS 21.040.10
J04
National Standards of People's Republic of China
Replacing GB/T 15756-1995
Common Thread Size Limit
Posted 2008-07-30
2009-02-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard replaces GB/T 15756-1995 "common thread size limit."
This standard and GB/T 15756-1995 increased compared to 6G internal thread tolerance, deleted 5h6h, 8h and 8g external thread tolerance
Tape, thread size can according to GB/T 193-2003 made some adjustments.
This standard thread series standard limit dimensions. Common Thread Series include.
--- GB/T 192-2003 ordinary screw threads - Basic type;
--- GB/T 193-2003 common thread diameter and pitch series;
--- GB/T 9144-2003 common thread preferred series;
--- GB/T 1414-2003 common thread pipe series;
--- GB/T 196-2003 common thread basic dimensions;
--- GB/T 197-2003 common thread tolerance;
--- GB/T 2516-2003 common thread limit deviation;
--- GB/T 15756-2008 common thread size limit;
--- GB/T 9145-2003 common thread moderate accuracy, the preferred range of the size limit;
--- GB/T 9146-2003 common thread rough accuracy, limit the size of the preferred series.
This standard by the National Standardization Technical Committee thread (SAC/TC108) and focal points.
This standard was drafted. Ningbo Kowloon Fastener Manufacturing Co., Ltd., machine Productivity Promotion Center.
The main drafters of this standard. Xu Yong, Li Xiaobin.
This standard replaces the standards previously issued as follows.
--- GB/T 15756-1995.
Common Thread Size Limit
1 Scope
This standard is based on GB/T 193-2003 "common thread diameter and pitch Series" and GB/T 197-2003 "common thread male
Poor ", sets out common thread size limit. Ordinary screw threads - Basic type conform GB/T 192-2003 "ordinary screw threads - Basic based"
Provisions.
This standard applies to the nominal diameter of 1mm ~ 300mm, the tolerance band of 4H, 5H, 6H, 7H, 6G, 4h, 6h, 6g, 6f and 6e common
Common thread.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 192-2003 ordinary screw threads - Basic model (ISO 68-1.1998, ISO generalpurposescrewthreads-
Basicprofile-Part 1. Metricscrewthreads, MOD)
GB/T 193-2003 common thread diameter and pitch range (ISO 261.1998, ISO generalpurposemetricscrew
threads-Generalplan, MOD)
GB/T 197-2003 common thread tolerance (ISO 965-1.1998, ISO generalpurposemetricscrewthreads-
Tolerances-Part 1. Principlesandbasicdata, MOD)
GB/T 14791 threads term (GB/T 14791-1993, neq ISO 5408. 1983)
3 Terms and Definitions
Terms and definitions GB/T 14791 stipulated apply to this standard.
Size Limit 4 female
4.1 internal thread diameter tolerance zone and its position shown in Figure 1.
4.2 internal thread size limit formula
Dmin = D + EI
Note. D large-diameter threaded straight at flank disappear.
D2min = Dmin-3/4H
= Dmin-3/4 × 0.866025404P
D2max = D2min + TD2
D1min = Dmin-5/4H
= Dmin-5/4 × 0.866025404P
D1max = D1min + TD1
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