What does a bolt specified as 1/4-28 indicate about its size?

What does a bolt specified as 1/4-28 indicate about its size?

• A. 1/4 inch diameter with 28 threads per inch
• B. 1/4 inch diameter with 14 threads per inch
• C. 1/2 inch diameter with 28 threads per inch
• D. 1 inch diameter with 28 threads per inch

Answer: (A)

A bolt specified as 1/4-28 conveys specific information about its dimensions and threading. The first portion, "1/4," indicates that the bolt has a diameter of 1/4 inch. The second part, "28," describes the threading of the bolt, specifying that there are 28 threads per inch. This thread count is crucial for determining the compatibility of the bolt with corresponding nuts and tapped holes, as it defines how tightly and securely the bolt can be assembled with those components. In mechanical applications, understanding thread size and pitch, such as in this example, ensures that components fit together appropriately and function correctly. Each specification is vital, as using an incorrect size can lead to mechanical failure or inefficiency in the assembly.

A bolt specified as 1/4-28 conveys specific information about its dimensions and threading. The first portion, "1/4," indicates that the bolt has a diameter of 1/4 inch. The second part, "28," describes the threading of the bolt, specifying that there are 28 threads per inch. This thread count is crucial for determining the compatibility of the bolt with corresponding nuts and tapped holes, as it defines how tightly and securely the bolt can be assembled with those components.

In mechanical applications, understanding thread size and pitch, such as in this example, ensures that components fit together appropriately and function correctly. Each specification is vital, as using an incorrect size can lead to mechanical failure or inefficiency in the assembly.