The RMK-6-MP is a Marsh Marine style in-line rubber-moulded subsea connector (6 contacts, male (pins)) purpose-built for commercial diver umbilical communications, underwater cameras, lighting and instrumentation. The special neoprene body is moulded directly onto a 18/6 AWG SOOW pigtail, with hard gold-plated contacts per ASTM-B-488 and a visual index in-line with contact #1. Marsh Marine style connectors are inter-mateable between brands in this category.
RMK-6-MP6 Contacts Male600 V DCUp to 20,000 psi MatedDiver Umbilical CommsMarsh Marine Style
Key Design Features
Purpose-built for commercial diving: flexible rubber body, push-to-mate geometry and tool-free locking sleeve designed for use with thick diving gloves.
600 V DC contacts: copper-alloy contacts hard gold plated per ASTM-B-488 for low, stable contact resistance in seawater service.
Up to 20,000 psi mated: with high-pressure (HP) locking sleeve the mated pair is rated to 20,000 psi (approx. 13,000 m); low-pressure (LP) sleeves are rated to 4,000 psi.
Inter-mateable: Marsh Marine style RMG/RMK faces mate with most major brands in this category, so existing umbilicals and helmets need no re-termination.
Visual index in-line with contact #1: fast, error-free orientation on deck and in low visibility.
Complete system: matched MP/FS counterparts, G/K locking sleeves and HP/LP dummy plugs available from one supplier.
Electrical & Mechanical Specifications
Parameter
Specification
Model number
RMK-6-MP
Series
RMG / RMK rubber-moulded diving series
Configuration
In-line connector — 6 contacts, Male (pins)
Contact layout
1 × #14 AWG + 1 × #16 AWG + 4 × #20 AWG
Voltage rating
600 V DC (contact factory for higher voltage requirements)
Current rating
On request — confirm with factory for 5/6-contact versions
Pressure rating, mated
Up to 20,000 psi with HP locking sleeve; 4,000 psi with LP sleeve
Pigtail cable
18/6 AWG SOOW, 29 in (0.74 m) pigtail
Body material
Special neoprene, moulded
Contacts
Copper alloy / brass, hard gold plated per ASTM-B-488
Mechanical Dimensions
Parameter
Specification
Overall length (male plug)
2.6 in (66 mm), excluding pigtail
Overall length (female, sleeve engaged)
2.9 in (74 mm); rear section 1.13 in (29 mm)
Mating face diameter
0.75 in (19 mm)
Right-angle female option
RMG FS R/A, 2.06 in (52 mm) height
Mating & Compatibility
Parameter
Specification
Mates with
RMK-6-FS in-line female connector
Dummy connector
RMK-6-FSD dummy connector
Locking sleeve
K-MLS-D (Delrin standard; -S = stainless steel)
Interchangeability
Marsh Marine style — inter-mateable between brands in this RMG/RMK category
Typical Applications
Diver umbilical communications and extension cables, helmet and mask connections, bell and saturation
diving umbilical joints, underwater cameras, lighting and instrumentation, hot-water suit umbilicals and
IMCA-compliant DSV diving spreads.
Notes for Selection
Locking sleeve required. Always install the correct locking sleeve after mating (K-MLS-D for this connector; -S suffix for stainless steel). High-pressure (HP) versions are rated to 20,000 psi mated, low-pressure (LP) versions to 4,000 psi — select the sleeve and dummy to match the application depth. Install the dummy plug before water entry, rinse with fresh water after every seawater exposure and lubricate O-rings before storage.
Custom configurations available
Cable type and length, contact count, right-angle (R/A) female versions and Gripper-style ruggedised
bodies can be specified to order. Factory-terminated assemblies and matched sets with locking sleeves and
dummy plugs available. Send us your requirement for a quotation.