130471 Our « Serrated washers » family has been designed to ensure secure fastening over time for all assembly challenges. It is usually used before a locknut, and acts as an anti-vibration device.It also prevents an inadvertently loosening. Category: Serrated washers Additional information Contact Form Additional information Ø External [d2] (mm) 15.30 Ø Internal [d1] (mm) 4.90 Maximum hardness [HV] 510 Metal thickness (mm) 0.80 Minimum hardness [HV] 430 Screw diameter M 4 Number of teeth (internal) 7 Number of teeth (min) 14 Contact FormLast name *First name *Company *Email *PhoneMessage *0 / 180 Send the message Related products 130301 100501 130402 100301