Flange nuts 1)Material: Carbon,stainless steel 2)Size: Un- ... ZY,Nickel, ZP.else 4)Tolerance:0.01... DetailsItem nameHexagon flange nutsmaterialCarbon steel, stainless steel grade4.8/8.8/9.8 ... sizeM5-M6Surfaceplain,zinc plated,black oxide,hot dip galv.etcD/T25-30days after order confirmationCustomizeddifferent sizes and colors/customer's design ... know more,pls feel free to contact us. Hexagon flange nuts