Round standoffs are similar in purpose to round spacers in that they separate or connect components, but differ in one regard: their insides are threaded, instead of smooth. In fact, some refer to a round standoff as a threaded spacer. The interior threads are able to accommodate a screw and should be used when hold is important. Round standoffs also differ from hex standoffs, which are better suited to applications in which wrenching of the standoff may be needed. Round standoffs vary by screw size, length, outside diameter, material, and finish, among other considerations. One significant difference between products concerns what the standoffs are made of. Zoro carries stainless steel standoffs, aluminum standoffs, nylon standoffs and brass standoffs. For other ways to provide space between assemblies, see our square standoffs and slot mount standoffs.