A Nylon Hex Standoff Spacer (3mm x 20mm)—commonly known as an M3x20 standoff—is a lightweight, electrically non-conductive hardware component. It features a 3mm metric thread (M3) and a 20mm long hexagonal body, used to safely elevate circuit boards and prevent short circuits.

Dimensions: 3mm thread diameter (M3) by 20mm body length.
Material: Durable, rust-proof, and insulating nylon plastic.
Shape: Hexagonal body, allowing tight grip with a small wrench or pliers.
Configurations: Available in Female-Female (threaded all the way through) or Male-Female (with an extra protruding 6mm threaded screw tip on one end)