Sea-Dog Line 441004 Double Contact Bayonet Base Bulb #1004

The Sea-Dog Line 441004 is a standard automotive-style #1004 replacement bulb featuring a double contact bayonet (BA15d) base. This 12-volt incandescent bulb is commonly used in marine navigation lights, running lights, and interior lighting applications where a dual-contact connection is required for proper grounding and operation.

Key Features:

• Standard #1004 bulb specification with double contact bayonet base
• 12-volt DC operation, ideal for marine electrical systems
• BA15d base type fits dual-contact bayonet sockets
• Clear glass construction for maximum light output
• Direct replacement for worn or burned-out navigation and utility bulbs

This replacement bulb is designed to meet the lighting needs of boats, yachts, and other marine vessels. The double contact design ensures reliable electrical connection and proper circuit grounding. Sea-Dog Line manufactures quality marine hardware and electrical components built to withstand harsh saltwater environments.