GB/T 197-2018 螺纹公差标准

Introduction to the Standard GB/T 197-2018 specifies tolerances for general purpose metric screw threads, ensuring interchangeability and performance in mechanical applications. This standard defines fundamental deviations, diameter tolerances, engagement lengths, and...

GB/T 5280-2002 自攻螺钉螺纹标准

Introduction to the Standard GB/T 5280-2002 specifies the thread dimensions and end types for self-tapping screws (sheet metal screws) with thread sizes ranging from ST1.5 to ST9.5. This standard ensures uniformity in manufacturing, facilitating reliable fastening in...

GB/T 1804-2000 线性角度公差

Article Outline This article provides a detailed exploration of GB/T 1804-2000, equivalent to ISO 2768-1:1989, focusing on tolerances for unspecified linear and angular dimensions. The structure includes: Introduction to the Standard Table 1: Linear Dimensions...