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

(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.