Cant access the backside to through-bolt No problem, use a rivet. Stainless steel rivets are widely used for non-critical equipment installations on masts and other structures with limited or no access to secure washers and nuts. They are ideal for installing deck lights, bimini frame brackets and much more. These rivets are constructed using 18-8 stainless steel for strength and corrosion resistance and are available in commonly used diameters and grips to match the needs of a variety of projects. Installation requires special tool with appropriate die to match mandrel diameter. Key Features Allows blind installation when access to through-bolt isnt possibleIdeal for installation of non-critical equipment on mast, radar towers and more 18-8 stainless steel for excellent blend of strength and corrosion resistance Available in commonly used diameters and grip lengths Sold in different quantities to match needs of application Requires the use of special tool for installation