nylon insert lock nut 1)sizes:M2-N24 2)Material:steel,stainless steel, 3)Surface:zinc white,blue, nylon insert lock nut:Item name: high quality nylon insert lock nuttdesign prevents burnouts and eliminates the need for indexing and retapping to remove weld spatter.Thread sizes #4 to 1/4"size: M6-M24Material: stainless steel,iron,copper,carbon steelFinish: black nickel,white zinc,bule zinc,color ...