Front Panel Blind Nuts, Marine Fender Welding Nuts (M16-M64) Hiawa Hardware & Machinery Co., Ltd. Base Info Model NO.:M16-M64Material:Stainless SteelType:Round HeadConnection:Common BoltHead Style:RoundStandard:DINGrade:6.8Size:M16-M64 Description Pre:Hex Castle Nuts Next:Precision Screw Nut and Bolts Screw Insert Copper Nuts for Screw-PT137