M4 Black Nylon Flat Washers, 4mm ID 9mm OD 1mm Thickness Plastic Sealing Gask…
Size: M4 x 9mm x 1mm. Fastener Size: M4. Thread Size: M4. PRODUCT SPECIFICATION Nylon flat washers are mainly used to reduce friction between fasteners, prevent loosening or disperse pressure. Fastener Type: Flat Washer.