HYSF G-FLS-D / G-MLS-D Underwater Dummy Plug & Locking Sleeve Set – Reliable Protection for Subsea Connectors

Plug Color Configuration Available in standard black POM material with high-visibility contrast sections for easy identification underwater. The G-FLS-D and G-MLS-D series feature a robust black body finish optimized for marine environments, providing excellent corrosion resistance and low visibility in deep-sea operations while maintaining professional HYSF branding consistency across the underwater connector lineup.

Main Parameters

• Depth Rating: 6000 meters
• Mating Cycles: >500
• Temperature Range: -4°C to +60°C
• Electrical Protection: Fully sealed dummy configuration for unused ports
• Pressure Resistance: Designed for extreme subsea pressure environments
• IP Rating: IP68 / full underwater submersion protection These high-performance parameters make the G-FLS-D and G-MLS-D ideal for protecting circular, micro circular, and standard underwater connectors from water ingress, dust, and mechanical damage during storage, transport, and deployment.

Material Parameters

• Body Material: High-strength Chloroprene Rubber / POM (Polyoxymethylene) for superior sealing and durability
• Locking Sleeve: Premium POM with excellent dimensional stability
• O-Rings: Nitrile (NBR) for reliable watertight sealing
• Optional Upgrades: 316L Stainless Steel or Titanium shells for enhanced corrosion resistance in aggressive saltwater conditions All materials are selected for long-term performance in harsh marine environments, offering excellent resistance to seawater, UV, and chemicals while maintaining flexibility and sealing integrity.

Dimension & Thread Specifications G-FLS-D (Larger Locking/Dummy Plug):

• Overall Length: 34.5 mm
• Diameter: Ø25.5 mm
• Compact yet robust design for secure fit on standard bulkhead and inline connectors

G-MLS-D (Smaller Locking/Dummy Plug):

• Overall Length: 10.5 mm
• Compact profile for micro circular and space-constrained applications
• Thread Compatibility: Metric and imperial options available (M-series and standard UNF threads per HYSF catalog)
• Recommended Mounting: Matches HYSF recommended mounting holes for seamless integration with the full range of underwater connectors.

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These precision-engineered dummy plugs and locking sleeves from HYSF ensure maximum protection and reliability for your underwater connector systems in ROV, AUV, offshore oil & gas, renewable energy, and scientific research applications. Perfect compatibility with HYSF Small Circular, Micro Circular, Standard Circular, and High Power series connectors. Contact us for custom cable lengths, thread options, and material upgrades.