本文的目的是提供一些基本的紧固件信息，设计师和用户可以吸收并补充目前存在的有限理解。将讨论螺纹几何、螺纹系列和螺纹类别，以确保理解这些基本概念，然后详细检查测量技术和螺纹性能。

THIS PAPER'S PURPOSE IS TO PROVIDE SOME BASIC FASTENER INFORMATION THAT DESIGNERS AND USERS CAN ABSORB AND ADD TO THE LIMITED UNDERSTANDING THAT CURRENTLY EXISTS. SCREW THREAD GEOMETRY, THREAD SERIES AND THREAD CLASSES WILL BE DISCUSSED TO ENSURE THAT THESE FUNDAMENTAL CONCEPTS ARE UNDERSTOOD AND THEN GAGING TECHNIQUES AND SCREW THREAD PERFORMANCE WILL BE EXAMINED IN SOME DETAIL.