Our standoff screws are widely used in computers, computer cases, circuit board assembly, electronic fields, etc. The PCB standoffs play a supporting, isolating and fastening role in the use.Specification Material: NylonThread: M4Thread Pitch: 0.7mmStud Length-Screw Length: 50mm+6mmPacking List: 20pcs M4x50+6mm Nylon Standoff Spacer, 20pcs M4 NutsAdvantageThe nylon standoffs are rust-free, durable, stable, and reusable compared with metal standoffs.InstructionDesigned to keep PCB at a consistent height and prevent it from bending, twisting, and short-circuiting.NOTE: Please measure the required length of your project, and then select the appropriate standoffs to save your time and effort.