What is used to hold bolts in place along with a washer?

A nut is a fastener that is used in conjunction with a bolt to secure objects together. It has internal threads that allow it to be threaded onto the bolt. When a bolt passes through an object and is fitted with a washer, a nut is then placed on the end of the bolt to create a secure joint. The washer serves to distribute the load and protect the surface of the material being fastened. This combination of the bolt, washer, and nut provides a tight and stable connection, ensuring that the parts remain fixed in place even under stress or movement.

The other options represent fasteners or devices that serve different purposes. An anchor is typically used to secure items to a surface but not in the specific context of holding bolts. A screw is a fastener that creates its own threads in a material and does not require a nut. A clip might be used to hold items together or in place, but it does not fulfill the role of securing bolts like a nut does.