GB/T 20666-2006

Active

Unified screw threads - Tolerances

统一螺纹 公差

Standard Type
GBT
ICS
21.040.20
CCS
J04
Status
Active
Issue Date
2006-12-08
Implementation
2007-07-01
Centralized Committee
国家标准委
Issuing Authority
中华人民共和国国家质量监督检验检疫总局、中国国家标准化管理委员会

Application Summary AI generated

GB/T 20666-2006 specifies the tolerance system for unified screw threads, defining the permissible deviations for thread dimensions such as pitch diameter, major diameter, and minor diameter. It is applied in the manufacturing and quality inspection of mechanical components using unified inch-series threads, particularly in industries like aerospace, automotive, and general engineering where interchangeability with U.S. or international standards is required. This standard ensures consistent fit and performance in threaded fasteners and assemblies across cross-border production and trade contexts.

Related Standards

GB/T 9144-2003 General purpose metric screw threads--Preferable plan GB/T 2516-2003 General purpose metric screw threads--Limit deviations GB/T 197-2003 General purpose metric screw threads--Tolerances GB/T 196-2003 General purpose metric screw threads--Basic dimensions GB/T 193-2003 General purpose metric screw threads--Generalplan GB/T 192-2003 General purpose metric screw threads--Basic profile GB/T 1414-2003 General purpose metric screw threads--The plan for pipe systems GB/T 9146-2003 General purpose metric screw threads--Limits of sizes for the screw threads of coarse quality and preferable plan
Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.