Hex Nut Sleeve Anchor M16 x 111mm (20) - MASONMATE 0839M580055, These MasonMate Hex Nut Sleeve Anchors have the following specifications: Size: M16 x 111mm.Max. Fixture Thickness: 65mm.Min Hole Depth: 60mm.Qty Per Box: 20. MASONMATE 0839M580055 Hex Nut Sleeve Anchor M16 x 111mm (20)