GB/T 15054.5-1994 Limit dimensions of small threads
Basic Information
Standard ID:
GB/T 15054.5-1994
Standard Name: Limit dimensions of small threads
Chinese Name:
小螺纹 极限尺寸
Standard category:National Standard (GB)
state:in force
Date of Release1994-05-03
Date of Implementation:1995-03-01
standard classification number
Standard ICS number:Mechanical systems and general parts >> 21.040 thread
Standard Classification Number:Machinery>>General Machinery>>J04 Basic Standards and General Methods
Publication information
other information
Release date:1994-05-03
Review date:2004-10-14
Drafting unit:Mechanical Standardization Institute
Focal point unit:National Thread Standardization Technical Committee
Publishing department:National Standardization Administration
competent authority:National Standardization Administration
Introduction to standards:
GB/T 15054.5-1994 Small thread limit size GB/T15054.5-1994 standard download decompression password: www.bzxz.net
Some standard content:
National Standard of the People's Republic of China
Limit size
Miniature screw threads
Miniature screw threads--Limits of sizesThis standard refers to the international standard ISO/R1501--70 "ISO small screw threads". Subject content and scope of application
This standard specifies the limit size of the preferred tolerance thread in GB/T15054.4. This standard is applicable to small screw threads for general purposes with a nominal diameter range of 0.3 to 1.4 mm. 2 Reference standards
GB/T 15054.1
GB/T 15054.2
GB/T 15054.3Www.bzxZ.net
GB/T15054.4
3 Limit dimensions
Small thread profile
Small thread
Small thread
3.1 Limit dimension calculation formula
Dmin=d;
Diameter and pitch series
Basic dimensions
D2mxd—0.75H+TDzd-0.649 52P+TDz;D2min=d-0.75H =d--0.649 52 P;Dimax =d-2H,+TD, -d -- 0. 96P+TD,;Dimin =d -2H, - d--0. 96P;
dmax d;
dmin =d-Td;
d2mxd-- 0. 75H=d-0. 649 52 P;d2min =d-0. 75H-Tdz=d-0. 649 52 P-Td2;damx=d—2hg - d-1. 12 P;
dsmin d--2h;-Tdg=d--1. 12P-Tdg. 3.2 The limit sizes of internal and external threads are listed in Tables 1 and 2 respectively. Table 14H5 Limit dimensions of internal threads
Thread code
Approved by the State Administration of Technical Supervision on May 3, 1994 Major diameter
GB/T15054.5---94
Implemented on March 1, 1995
Thread code
GB/T15054.5--94
Continued Table 1
Table 25h3 Limit dimensions of external threads
Additional notes:
This standard was proposed by the Ministry of Machinery Industry of the People's Republic of China. This standard was drafted and managed by the Standardization Research Institute of the Ministry of Machinery Industry. The main drafters of this standard are Li Xiaobin, Yu Yuan and Yu Minhui. 236
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