Product Series

（100% SubConn、Seacon and Burton Compatible）

HYSF RM Series Subsea Connector | 2-4 Pin Underwater RM Connector

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1. Drawing information

Dimensions in mm (1 mm = 0.03937 inch)
Threads in inches (1 inch = 25.4 mm)

2. Plug Color Configuration

Standard inline cable color code: 2-pin: 1 Black, 2 White 3-pin: 1 Black, 2 White, 3 Red 4-pin: 1 Black, 2 White, 3 Red, 4 Green O-rings: Black Nitrile (standard), optional blue/green for easy underwater identification. Bulkhead versions feature high-visibility hex nut finish in stainless steel silver. Dummy/locking sleeves (G-FLS-D / G-MLS-D) in black POM. Custom cable jacket colors and laser marking available.

3. Main parameters

HYSF RM Series Subsea Connector | 2-4 Pin Underwater RM Connector | Low Profile Bulkhead Connector | Subconn Compatible RM Series Hybrid Connector

Contacts: 2, 3, 4 pins (RM Series)
Depth Rating: 6000 meters
Matings: >500 cycles
Electrical Specification: 300V / 3–10 Amp
Contact Resistance: <0.010 Ω
Insulation Resistance: >200 MΩ
Temperature Rating: -4°C to +60°C
Design: Compact low-profile construction with robust bulkhead mounting options
Compatibility: Fully interchangeable with Subconn® RM Series and major subsea brands
Custom Options: Single/Double O-ring, extended thread lengths, custom cable lengths, material upgrades

4. Material & Installation Requirements

Connector Body: High-flex Chloroprene rubber for superior sealing and flexibility
Shell / Bulkhead: 316L Stainless Steel (standard) or Titanium (optional for lightweight & extreme corrosion resistance)
Contacts: Gold plated brass
O-Rings: Nitrile (standard) or Viton/FKM
Locking Sleeve / Dummy: POM (Polyoxymethylene)
Nuts & Washers: Stainless Steel

5. Dimension & Thread Specifications

(All dimensions in mm. Threads in inches. 1 inch = 25.4 mm)

Inline Versions

RMG4FS (Female): Ø12.75 mm / Ø18.5 mm, Length 56 mm
RMG4MP (Male Plug): Ø12.75 mm, Length 15.9 mm
RMG4FSD / VMG4FSD (Double O-ring variants): Ø18.5 mm, extended sealing
RMG4MPD (Male Double O-ring): Length 56 mm

Bulkhead Versions

XSG-4-BCL / RMG-4-BCL: 3/4″ × 16UNF thread, O-ring 2-213, Hex size 34.9 mm / 39.7 mm, Overall length 30.5 mm
VMG4FS / VMG4FSD: Ø18.5 mm, Length 56 mm

Accessories

G-FLS-D (Female Locking Sleeve): Ø25.5 mm × 34.5 mm
G-MLS-D (Male Locking Sleeve): Ø10.5 mm × 10.5 mm

HYSF RM Series (2–4 Contacts) connectors are compact, high-reliability underwater connectors designed for space-constrained applications. Ideal for ROVs, AUVs, underwater cameras, sensors, lights, and subsea instrumentation requiring 2 to 4 pins. The low-profile design with robust 3/4″ UNF bulkhead mounting ensures leak-proof performance at full ocean depth.

Fully customizable – stainless steel or titanium construction, single or double O-ring configuration, extended threads, custom cable lengths, and exact dimensional matching to Subconn® specifications. Contact HYSF for OEM solutions, fast prototyping, and competitive pricing.