This standard specifies the limit deviations of the pitch diameter and top diameter of common threads based on the basic deviations and tolerances of GB/T 197-2003. The basic tooth profile, diameter and pitch series of common threads comply with the provisions of GB/T 192-2003 and GB/T 193-2003 respectively. They are suitable for general-purpose mechanical fastening threaded connections. The threads themselves do not have a sealing function. GB/T 2516-2003 Limit Deviations of Common Threads GB/T2516-2003 Standard download decompression password: www.bzxz.net

GB/T 2516--2003
This standard is modified to adopt ISO965-3:1998 "ISO-General purpose metric screw thread-Tolerances Part 3: Deviations of structural screw threads" (English version). There is no technical difference between the Chinese standard and the ISO standard. The two standards are only different in the standard name. In order to reflect its standard, the ISO standard also provides the equivalent diameter (equivalent to the smooth rod test piece) that can be used to calculate the static tensile strength of external threads, and introduces the term "structural thread" (thread with strength requirements) in the standard name. Considering that there is no corresponding thread-specific term in the Chinese standard, and using it will narrow the scope of application of the standard, the Chinese standard does not adopt the ISO standard name. This standard mainly provides the limit deviations of the middle diameter and top diameter of ordinary threads, and provides the stress equivalent diameter information only to explain the "allowable" (m i y) calculation method. This strength calculation algorithm is neither the "requirement" content of the standard nor the "recommendation" content of the standard. Therefore, the application field of the entire standard should not be limited and narrowed in order to highlight it. In addition, the Chinese standard also corrects a printing error in the ISO standard. Change the "should not exceed the basic tooth profile" in the first paragraph of Chapter 4 of the ISO standard to "should not exceed the maximum solid tooth profile determined by the basic tooth profile and the position of the tolerance zone" (the second paragraph of Chapter 4 of this edition). ISO standards do not consider the existence of the basic deviation of the bottom diameter. GB/T14791--1993 "Thread Terminology" is different from ISO5408:1983 "Cylindrical Thread Terminology". Threads can be divided into cylindrical threads and conical threads; sealed threads and non-sealed threads; mechanical fastening threads and transmission threads; symmetrical tooth profile threads and asymmetrical tooth profile threads. At present, the ISO5408 standard only specifies the terminology of cylindrical threads (part of mechanical fastening threads and part of transmission threads), which is far from meeting the actual production needs. my country has formulated thread terminology standards applicable to various major threads with reference to the practices of Japan, the United States, the United Kingdom, Russia and other countries. That is, the technical content of my country's thread terminology standards is relatively comprehensive, and it has included the technical content of the ISO thread terminology standards.
This standard replaces GB/T25161981 "Ordinary Thread Deviation Table". Compared with GB/T2516-1981, this standard has the following technical changes: a) This standard adds the content of external thread minor diameter deviation for strength calculation (see Chapter 4 and Table 1); b) Changes in tolerance zone and size specifications (Table of 1981 edition; Table 1 of this edition). It corresponds to the phase change in size specifications and tolerance zone of the new standards GB/T193-2003 "Ordinary Thread Diameter and Pitch Series" and GB/T197-2003 "Ordinary Thread Tolerance".
This standard is the limit deviation standard in the ordinary thread series standard. The common thread series standards include: GB/T192--2003 "Basic tooth profile of common thread"; - GB/T 193-2003
"Common thread"
Diameter and pitch series":
"Common thread
-GB/T9144-2003
-—GB/T1414-2003
"Common thread
-GB/T196-2003
-GB/T 197--2003
Preferred series";
Pipe series":
"Basic dimensions of ordinary threads";
"Tolerance of ordinary threads";
Limit deviation";
-GB/T2516-2003 "Ordinary threads #
-GB/T15756-1995 "Limit dimensions of ordinary threads",-GB/T9145-2003 "Limit dimensions of ordinary threads with medium precision and preferred series"-GB/T9146-2003 "Limit dimensions of ordinary threads with rough precision and preferred series". This standard is the basis for establishing the limit dimension standard of ordinary threads. This standard is proposed and managed by the National Technical Committee for Thread Standardization (SAC/TC108). The responsible drafting unit of this standard: Mechanical Science Research Institute. The main drafter of this standard: Li Xiaobin.
This standard was first issued in 1963 and revised for the first time in 1981. 1
1 Scope
Ordinary thread
Limit deviation
GB/T2516—2003
This standard specifies the limit deviations of the middle diameter and top diameter of ordinary threads (metric threads for general use) based on the basic deviations and tolerances of GB/T197-2003. The basic tooth profile, diameter and pitch series of ordinary threads conform to the provisions of GB/T192--2003 and GB/T193-2003 respectively.
This standard is applicable to mechanical fastening threaded connections for general purposes, and the threads themselves do not have a sealing function. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties that reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version is applicable to this standard. GB/T 192--2003 General thread basic profile (ISO 68-1:1998, ISO general purpose screw threads-Basic profile-Part 1: Metric screw threads, MOD) GB/T193-2003 General thread diameter and pitch series (ISO261:1998, ISOgeneralpurposemetric screwthreads—General plan, MOD)
GB/T 197—2003 General thread tolerance (ISO 965-1:1998, ISO general purpose metric screw threadsTolerances--Part l: Principles and basic data, MOD) GB/T14791 Thread terminology (neqISO5408:1983) 3 Terms and definitions
The terms and definitions specified in GB/T14791 apply to this standard. 4 Limit deviation
The limit deviation values ​​of the thread pitch diameter and top diameter are shown in Table 1. Any point on the bottom profile of the internal and external threads should not exceed the maximum solid tooth profile determined by the basic tooth profile and the position of the tolerance zone. The deviation value of the external thread minor diameter in the table is given based on the flattening height H#
before the number, which can be used for stress calculation of external threads. Note: The calculation formula for the deviation of the external thread minor diameter is 1 (lesl+number). Unless otherwise specified, the tolerance zone applies to the thread before coating. After coating, any point on the thread profile should not exceed the maximum solid tooth profile determined by the tolerance zone position H or h. Note: The tolerance zone is only applicable to threads with thin coatings. For example, electroplated threads. GB/T 2516--2003
Basic major diameter/
Pitch/
Limit deviation of thread
Internal thread
5g6i
External thread
Unit is micrometer
Used to calculate stress
Deviation
Basic major diameter
Pitch/
Internal thread
Table 1 (continued)
External thread
GB/T2516--2003
Unit is micrometer
Used to calculate stress
GB/T 2516--2003
Basic major diameter/
2.8
Pitch/
Internal thread
Table 1 (continued)
External thread
—104
— 45
—106
—101
Unit is micrometer
Used for calculating
—100
Calculating stress
—100
Basic major diameter/
Pitch/
Internal thread
Table 1 (continued)
External thread
—106
—159
—112
—168
GB/T 2516—2003
The unit is Huimei
—106
—126
—146
—125
—140
—196
—140||t t||Used to calculate
Deviation of stress

—122
—108
—140
—123
—157
—123
GB/T 2516--2003
Basic major diameter/
Pitch/
Internal thread
Table 1 (continued)
+22+212
External thread
—112
—119
—142
—102
—100
Unit: micrometer
—178
Deviation used for calculating
stress
——130
—115||tt ||—153
—115
—108
Basic major diameter/
Internal thread
Table 1 (continued)
External thread
—116
—112
—250|| tt||—146
—213
—264
—106
—106
—177
—132
—237
—202
GB/T 2516—2003
The unit is Huimei
—112
—112
—206
—240
—363
—150
—281
—303
—236||t t||—407
—407
Deviation used to calculate
stress
2516—2003
Basic major diameter/
Royal Meimei Meimei
11.222. 4
Tolerance #
Internal thread
Table 1 (continued)
External thread
—106
—112
Unit is micrometer
—112
Tolerance for calculating stress
by hand
—184
—170
—180
—208
—180
—222
—217
—217
—217||t t||—249
—249
Basic thread/
Internal thread
Table 1 (continued)
External thread
GB/T 2516--2003
unit is micron
—224
—163
—125
—212
—132
—1 32
—307
—170bzxz.net
Deviation used to calculate
stress
|tt||—180
—572
GB/T 2516—2003
Xinben large diameter/
internal thread
small 132
→355
Xi 1 (continued)
external thread
—151
—125||tt ||—276
—150
—217
—182
—332
—106
—170
—132
—250
~ 32
unit is micron
for meter
—112
—240
—306
—150
—303
—268
—407
—351
—488
Deviation of calculated stress

—204||tt| |—144
—204
—144
—217
—213
—289
—341
— 327
Basic major diameter/
Pitch/
Internal thread
Table 1 (continued)
-→375
External thread
GB/T 2516--2003
unit is micron
: 478
used to calculate the deviation of stress
—433
—481
—481
—481
—481
—505
—5774
Tolerance #
Internal thread
Table 1 (continued)
External thread
—106
—112
Unit is micrometer
—112
Tolerance calculated by hand
Stress
—184
—170
—180
—208
—180
—222
—217
—217
—217||t t||—249
—249
Basic thread/
Internal thread
Table 1 (continued)
External thread
GB/T 2516--2003
unit is micron
—224
—163
—125
—212
—132
—1 32
—307
—170
Deviation used to calculate
stress
|tt||—180
—572
GB/T 2516 — 2003
||—276
—150
—217
—182
—332
—106
—170
—132
—250
～ 32
unit is micron
for meter
—112
—240
—306
—150
—303
—268
—407
—351
—488
Deviation of calculated stress

—204||tt| |—144
—204
—144
—217
—213
—289
—341
— 327
Basic major diameter/
Pitch/
Internal thread
Table 1 (continued)
-→375
External thread
GB/T 2516--2003
unit is micron
: 478
used to calculate the deviation of stress
—433
—481
—481
—481
—481
—505
—5774
Tolerance #
Internal thread
Table 1 (continued)
External thread
—106
—112
Unit is micrometer
—112
Tolerance calculated by hand
Stress
—184
—170
—180
—208
—180
—222
—217
—217
—217||t t||—249
—249
Basic thread/
Internal thread
Table 1 (continued)
External thread
GB/T 2516--2003
unit is micron
—224
—163
—125
—212
—132
—1 32
—307
—170
Deviation used to calculate
stress
|tt||—180
—572
GB/T 2516 — 2003
||—276
—150
—217
—182
—332
—106
—170
—132
—250
~ 32
unit is micron
for meter
—112
—240
—306
—150
—303
—268
—407
—351
—488
Deviation of calculated stress

—204||tt| |—144
—204
—144
—217
—213
—289
—341
— 327
Basic major diameter/
Pitch/
Internal thread
Table 1 (continued)
-→375
External thread
GB/T 2516--2003
unit is micron
: 478
used to calculate the deviation of stress
—433
—481
—481
—481
—481
—505
—577
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