规定了按照AS 1721或AS 1275制造的单头平行通用公制螺纹量规的要求。它包括量规的类型、螺纹的检查、螺纹量规的设计特征、材料和硬度要求，以及测量元件的极限和公差，在技术上与ISO 1502、ISO通用公制螺纹-测量相同。附录给出了量规的功能、使用和检查、量规偏差和公差的依据，以及推导特定量规限值的详细示例。

Specifies requirements for gauges for single start parallel general purpose metric screw threads manufactured to either AS 1721 or AS 1275. It covers types of gauges, inspection of screw threads, design features of screw gauges, material and hardness requirements, and limits and tolerances of gauging elements, and is technically identical with ISO 1502, ISO General Purpose Metric Screw Threads - Gauging. Appendices give notes on the function, use and checking of gauges, the bases for the gauge deviations and tolerances, and detailed examples of deriving specific gauge limits.