DNC-2058 Underwater M16 Power Bulkhead Connector with 5.5x2.1mm DC Plug
DNC-2058 is an underwater M16 power bulkhead connector designed to pass DC power into underwater housings, camera systems, strobes, CCTV setups, and custom marine electronics.
The connector uses a 5.5x2.1mm DC male plug on the internal side and allows compatible underwater systems to receive power without relying only on internal batteries.
Overview
DNC-2058 is useful when an underwater device needs continuous external power through a sealed housing wall. It can support circuits up to 24V and up to 5.0A at 12V, depending on the full system design, cable length, and connected equipment.
The built-in water block helps preserve housing vacuum integrity and provides extra protection against water ingress if an external cable or connector connection becomes damaged.
Key Features
- Underwater M16 power bulkhead connector
- 5.5x2.1mm DC male plug on the internal side
- Designed for camera, strobe, CCTV, and custom power applications
- Supports circuits up to 24V
- Rated up to 5.0A at 12V depending on system design
- M16x1 thread format
- Short-thread and long-thread options available
- Built-in water block for housing protection
- Marine-grade aluminum body with hard anodized coating
- Protective cap and security nut included
Applications
- Underwater camera power
- Underwater strobe power without relying only on batteries
- Underwater CCTV and surveillance systems
- Continuous power for long shooting or monitoring sessions
- Custom marine electronics and inspection systems
- Surface-powered underwater housings
Power Use Notes
DNC-2058 can be used to power compatible low-voltage underwater devices from an external power source. Current and voltage limits depend on the full system design, including cable length, connector configuration, power source, and device requirements.
For higher-power equipment, voltage drop and cable gauge must be considered before deployment.

Water Block
The DNC-2058 underwater power bulkhead connector includes a built-in water block.
The water block helps keep vacuum inside the housing when using an AirLock vacuum system. It also helps protect the housing against water penetration if the external cable or external connector connection becomes damaged.
Technical Specifications
- Product code: DNC-2058
- Connector type: underwater power bulkhead connector
- Internal plug: 5.5x2.1mm DC male plug
- Thread: M16x1
- Thread length: 6.5mm
- Thread options: short thread and long thread
- Voltage: up to 24V
- Current rating: up to 5.0A at 12V depending on system design
- Material: marine-grade aluminum with hard anodized coating
- Housing compatibility: Nauticam short-thread style, Aquatica / Amphibico / Aquatech long-thread style
Compatibility
DNC-2058 is compatible with Dive And See underwater power cable assemblies such as DNC-1135 / DNC-1113 underwater power cable, depending on connector configuration and system requirements.
Thread Options
Available thread configurations for this bulkhead connector include:
- M16x1 short thread for Nauticam-style housings
- M16x1 long thread with security nut for Aquatica and Amphibico-style housings
Outline Drawing
Outline dimensions drawing for an underwater M16 long-thread power bulkhead connector.

Frequently Asked Questions
What is DNC-2058 used for?
DNC-2058 is used to pass DC power through an underwater housing wall using an M16 bulkhead connector and a 5.5x2.1mm DC plug.
Can it power underwater strobes?
Yes, it can be used for compatible underwater strobe power systems when voltage, current, and cable design match the equipment requirements.
What plug is on the internal side?
The internal side uses a 5.5x2.1mm DC male plug.
Does it include a water block?
Yes. DNC-2058 includes a built-in water block for additional housing protection.
Which housings can it fit?
Short-thread versions are used for Nauticam-style housings, while long-thread versions with security nut can be used for Aquatica and Amphibico-style housings, depending on the exact port design.