How many threads per inch does a bolt designated as 1/4-28 have?

A bolt designated as 1/4-28 indicates that it has a nominal diameter of 1/4 inch and is threaded with 28 threads per inch. The second part of the designation, which is the number 28, specifies the thread count, meaning that there are 28 individual threads within one inch of the bolt's length. This designation follows a standard that helps determine compatibility with nuts and other components, ensuring proper fit and function in various mechanical applications. Understanding the meaning of these thread designations is crucial for properly selecting bolts and ensuring they meet the needed specifications for assembly and load-bearing requirements.