GB/T 20668-2006
ActiveUnified screw threads - Basic dimensions
统一螺纹 基本尺寸
Application Summary AI generated
This standard specifies the basic dimensions for unified screw threads, including major, pitch, and minor diameters, as well as thread tolerances. It is applied in mechanical engineering and manufacturing industries for designing and producing threaded fasteners, such as bolts, nuts, and screws, that require interchangeability between inch-based systems. The standard is particularly relevant for products exported to or used in North American markets where unified thread profiles are common.
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.