What materials are used for the contacts and plating?

The metal contacts (pins and sockets) are machined from high-conductivity UNS C36000 Brass or Beryllium Copper (for spring sockets). They are then subjected to Heavy Gold Plating (typically 3-5 microns over Nickel underplate) to ensure maximum corrosion resistance and conductivity.

The contact is the heart of the connector.

Substrate: Brass provides the mechanical strength, while Beryllium Copper provides the necessary spring elasticity for the female sockets.
Plating: We use a “Mil-Spec” grade gold plating. Gold is a noble metal that does not oxidize in seawater, ensuring that the Contact Resistance stays low over the 20-year design life of the product.
Why Nickel? A nickel underlayer prevents the copper from migrating into the gold, ensuring the plating remains durable.

John Zhang

(CEO & Lead Engineer)
Email: info@hysfsubsea.com
With over 15 years of expertise in subsea interconnect technology, I lead HYSF's R&D team in designing high-pressure (60MPa) solutions. My focus is on ensuring zero-leakage reliability for ROVs, AUVs, and offshore instrumentation. I personally oversee the validation of our custom connector prototypes.

Have a complex technical question?

Proven Solutions in the Field

A showcase of our successful collaborations with global marine robotics, energy, and research partners. Every project reflects our commitment to zero-leak integrity and operational reliability.

Custom 6-Port Watertight Enclosure & Subsea Interconnect System

Integrated Subsea Interconnect & Imaging Solutions

Custom Retractable Subsea Spiral Coiled Cable (Spring Cable)

High-Strength Titanium Alloy Subsea Penetrator

HYSF-high-density-25-pin-subsea-signal-connector-for-oceanographic-sensors

All-New Next-Generation Subsea IP Network Camera Series

Custom Branching Subsea Cable Network (Y-Splitter & Multi-Node)

Custom High-Intensity Subsea LED Light & Mounting Bracket System

PBOF Series Pressure-Balanced Oil-Filled Subsea Connectors

High-Performance Photoelectric Hybrid Subsea Connector

50MPa High-Precision Subsea Pressure Sensor

5MP High-Definition Underwater Observation Camera (40MPa)

Custom Subsea Bulkhead Flange Joint Connector

Multi-Core Split-Type Watertight Connector (Diverse Configurations)

Custom Miniature Single-Core In-Line Watertight Connector

70MPa Ultra-High Pressure Metal 61-Pin Subsea Connector

60MPa Metal Shell Bulkhead Connector with Triple Seal (4-61 Pins)

Gigabit Ethernet 12-Pin Subsea Connector (4 Power + 8 Network)

10-Pin Ethernet Subsea Connector (2 Power + 8 Network Cores)

Miniature Subsea Watertight Connector (Marine Bronze Base)

60MPa High-Pressure Metal Shell Watertight Connector (4-61 Pins)

RMG Series 4-Pin Subsea Engineering Cable Plug

Ultra-Miniature Subsea Watertight Connector Series (2-28 Pins)

Custom 6-Port Watertight Enclosure & Subsea Interconnect System

HYSF-140A-180A-high-current-underwater-power-connector-for-thrusters

MCPBOF2-8MF Oil-Filled Pressure Compensated Connector (8-Pin)

HYSF-custom-6-pin-40A-underwater-power-distribution-connector

MCBH-Hybrid 4+2 Photoelectric Subsea Connector (Power & Fiber Optic)

Right Angle Molded Micro Bulkhead Connector (LPMBH-IL12/16MF Compatible)

Single-Pin High-Current (150A) Subsea Power Connector

High-Frequency Subsea Coaxial RF Connector Assembly (50-3 / 50-5)

Custom Branching Subsea Cable Network (Tree Topology)

Custom Molded Subsea Penetrator with Integrated Multi-Core Cable

Custom 1-to-3 Fan-out Subsea Splitter Cable System

Micro Flange 3-Pin Subsea Bulkhead Connector (IL4MF Compatible)

5MP High-Definition Underwater Camera (40MPa / 316L Stainless Steel)

Custom 6-Pin / 40A Medium-Power Subsea Connector

Start Your Subsea Project with HYSF

Whether you need a quick quote for standard connectors or a complex custom cable assembly, our engineering team is ready to assist. Expect a technical response within 12 hours.