Body 높이 = 12mm PCB Hole Diameter = 4mm Material = Nylon Body Diameter = 9.5mm M4 Insert Stud Covers. Push fits onto M4 insert studs or weld studs to provide insulation between chassis and PCB A quarter turn locks part in position. Easy and quick to release PCB Thickness 1.57mm Hole diameter 4mm Outside diameter 9.5mm