Sea Dog Deck Plate. These Deck Plates can be opened with Deck Plate Keys (335680-1 not included). Use anti-seize lubricant to protect threads from galling. Constructed of corrosion resistant investment cast 316 stainless steel. Installs with four #12 FH fasteners (not included).

Deck plate opening: 3-1/4"
Deck plate flange outside diameter: 4-11/16"
Deck plate cutout: 3-1/2"
Deck plate mounting holes: 4"