We also manufacture high-performance dark thread cutting oil to ensure your threading machine works efficiently and effectively. Our reliable 792ALX bolt threading machine can produce Class 2A threads ranging from ¼” to 2”-no skilled operator necessary. No matter your bolt threading specifications, we have an extensive selection of industrial grade pipe and bolt threading machines to meet the requirements for any industry, including construction, military & defense, manufacturing, and fabrication. Class 2A is acceptable for the majority of applications and Unified Thread Standard (UTS) bolt classes. Measurements on top row represent UNC threads and measurements on bottom row represent UNF threads. Refer to the table for dimensions of commonly used bolt sizes. Minor diameter: The smallest and most inside diameter of a bolt’s shank.Pitch diameter: The diameter where the thread thickness = the space between threads.Major diameter: The largest and most outer diameter of a bolt’s shank.Bolt diameter is typically separated into three categories: The size of a bolt is determined by the diameter of the bolt’s shank (separate from the bolt head). On the other hand, the fine threads on UNF bolts give them higher tensile strength, making them useful for machine part assembly and other high precision applications. While both UNC and UNF bolts are used for fastening, they are often applied in different fields due to their unique advantages.įor example, the coarse threads on UNC bolts are incredibly versatile and resistant to damage, making them the standard choice for most lower-tolerance, general purpose applications. UNF threads are distinguished by having more threads per distance than UNC threads. UNC stands for unified course pitch threads whereas UNF stands for unified fine pitch threads. The designations provided under this series factor in both TPI and thread pitch, with UNC & UNF being two of the most common designations used. The Unified Thread Standard was established in 1949 by the United States, Canada, and Great Britain to define standards for fastener threads based off thread form, allowances, tolerances, and specific designations. See Product Details What is The Difference Between UNC Threads & UNF Threads? Unified Thread Standard
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