本标准涵盖了公认为“美国国家标准”的英寸系列螺纹杆的完整通用数据和尺寸数据包括直径#4至4英寸UNC、UNF、8UN和ACME的右手和左手螺纹。目前还没有英制螺纹杆的ISO标准。本标准中包含的尺寸数据并不意味着本文所述的所有产品都是库存生产尺寸。消费者应就库存生产规模清单咨询供应商。

This standard covers the complete general and dimensional data for inch series threaded rod recognized as "American National Standard." Included are diameters #4 through 4 inches UNC, UNF, 8UN, and ACME in both right and left handed threads. At this time there are no ISO Standards for Inch Threaded Rods. The inclusion of dimensional data in this standard is not intended to imply that all of the products described herein are stock production sizes. Consumers should consult with suppliers concerning lists of stock production sizes.