What is the size hole needed for a standard crossarm through bolt?

The standard size hole needed for a crossarm through bolt is 11/16 inch. This size allows for the proper fit of the bolt, ensuring that it can be securely tightened without excessive play, which is vital for the structural integrity of the installation. A hole that is too small may not allow the bolt to fit through, while a hole that is too large could lead to instability and inadequate support. Using the correct diameter ensures that the bolt maintains its strength and effectiveness in securing components together, particularly in applications where safety and reliability are paramount, such as in electrical or structural installations.

Other options like ¾ inch, ½ inch, and 1 inch do not align with the standard requirements for this type of application, as these sizes would either allow too much movement or not accommodate the bolt correctly. This consistency in sizing is critical across installations to ensure compatibility with standard hardware practices.