... steel, 3)Surface:zinc white,blue, nylon insert lock nut:Item name: high quality nylon insert lock nuttdesign prevents burnouts and eliminates ... ,BS,GB,ISO,DIN,AISIbrand name: JMorigin of place: Guangdong,China(Mainland)Packing: poly bag,carton boxPayment term: Weston Union, T/TDelivery ... accurate quotation as soon as possible.Production Line:Quality Control: nylon insert lock nut