#12 x 9 16" Daggerz Po Seal EPDM Bonded Washer 18 8 Stainless Steel, Pkg 12000 ECCL End Column Cap The Simpson Strong Tie RCKW3D rigid The Simpson Strong Tie RCKW3D rigid connector by Simpson Strong Tie has been developed to resist overturning moment at the base of exterior kneewalls and parapets as well as interior partial height walls or overhead ribbon window conditions This product is intended for use with 3 5 8x posts or columns but is also available in a wide range of other sizes and both nominal and rough cut lumber The inside diameter of the NEOWS120916 rubber washer tightly seals to the screw Daggerz™ brand Pro Seal EPDM Bonded Washers are designed for applications that require a leakproof seal