Spacers and standoffs
threaded separator of defined length used to raise one assembly above another
In general, a spacer is a solid material used to separate two parts in an assembly. Spacers can vary in size from microns to centimeters. They can be made of metal, plastic, glass, and other materials. Shapes include flat sheet, cylindrical and spherical.
A standoff is a threaded separator of defined length used to raise one part in an assembly above another. They are usually round or hex (for wrench tightening), often made of stainless steel, aluminum, brass, or nylon, and come in male-female or female-female forms. In electronics they are frequently used to raise a printed-circuit board above a surface. Insulating standoffs keep two parts from touching each other, thereby preventing electrical shorts. In some cases (e.g., D-subminiature connectors), short standoffs may be used to receive the jackscrews that lock the connection together.
In contrast, some spacers may look similar to standoffs but are unthreaded pieces of tubing which let the entire bolt pass through.
“Spacers and standoffs” enters the record as threaded separator of defined length used to raise one assembly above another. Crown Archives preserves that source wording while asking what Spacers, standoffs and threaded can confirm, complicate or overturn.
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