... % full inspection 4. excellent surface treatment Item NO. type of lock washersMaterialsIron, aluminum, steel, copper, plastic, carbon steel ... solder alloy, HSS, tool steels, or as per the customers’ requirements.DimensionsAccording to customer’s drawingSurface treatmentHeat treatment ... and so on.PackingWooden box, or as per the customer’s requirementsProcessing equipmentsCNC machining center, CNC lathe ...