... :steel,stainless steel, 3)Surface:zinc white,blue, nylon insert lock nut:Item name: high quality nylon insert lock nuttdesign prevents burnouts and ... : M6-M24Material: stainless steel,iron,copper,carbon steelFinish: black nickel,white zinc,bule zinc,color zinc,black zinc,chromeStandard: JIS,BS ... accurate quotation as soon as possible.Production Line:Quality Control: nylon insert lock nut