A boat may have several drainage systems. Install a garboard drain plug if your boat is stored ashore. Choose Sea-Dog Marine Garboard Drain Plug O ring (520069). The Captive Garboard Drain & Plug is a Gasket replacement only. The captive plug avoids the loss of a plug. Fabricated using corrosion-resistant investment cast 316 stainless steel. Buying from Sea Dog gives boat builders and owners the most exemplary dependability and performance. Key Features: 316 Stainless Steel Investment Cast Feature a classic design Durable and resistant to corrosion Constructed with excellent materials Straight replacement for the Sea-Dog Line bronze Garboards, parts 520040 and 520042 Installs using two number 8 FH screws (not included). Specifications: Brand: Sea Dog Marine SKU: 3-520069 UPC: 35514521987 Weight: 0.00 LBS Unit of Measure: EA Manufacturer Part Number (MPN): 520069 Fastener: #8 Weight: 0.10 lb Sea Dog has served the maritime sector since the 1900s. The company makes award-winning marine components and accessories, including cabinet and hatch hardware, electrical panels, connectors, and batteries. Investment Cast 316 Stainless Steel This Captive Garboard Drain & Plug is a direct replacement for the bronze, traditional style Sea-Dog Garboards (520040 and 520042). Captive plug prevents plug from being lost. Constructed of corrosion resistant investment cast 316 stainless steel. Installs with three #8 FH fasteners (not included).