... Square/Slot. etc.UsageAutomotive/ Car Thermostat, Switch, Electric Heating, Transformer, etc.TypePrecision nonstandard parts(OEM Service)CertificateISO9001 ... , Copper, Gold Plated, Painting, Anodizing Heat treatment, Black Oxid(According to customer's demands)3. Process is ... screw are applied to electric motor, cartridge heater tube, water heater tube, water kettle heating tube,switch,thermostat ...