JIC 6 Male to G1/4 Male Adapter UNDERSEA 1415

Manufactured by UNDERSEA Centre Ltd — Southampton-based specialists in diving fittings, gas facility components and compressor parts since 1979 — the 1415 is a straight male-to-male adapter precision-machined from 316 grade A4 stainless steel. It converts JIC-6 male threads (9/16-18 UNF, 37° flare per SAE J514 / ISO 8434-2) to G1/4 BSP male ports (ISO 228-1 BSPP), enabling seamless integration of North American JIC-standard hoses and instruments into European BSP gas infrastructure. Every item is manufactured to British Standards and applicable DIN specifications, delivering the reliability demanded across professional dive operations from BSAC clubs to commercial diving support vessels.

Technical specifications

• Manufacturer reference: 1415.
• Thread end 1 (male): JIC-6 — 9/16″-18 UNF — 37° cone angle (SAE J514 / ISO 8434-2).
• Thread end 2 (male): G1/4 BSP parallel (BSPP — ISO 228-1).
• Material: 316 grade A4 stainless steel (austenitic marine grade, ISO 3506).
• Configuration: straight male × male.
• Manufacturing standard: British Standards + DIN.
• G1/4 sealing: Dowty seal or 10 × 2 mm copper washer (not supplied — installation dependent).
• Weight: approx. 200 g.
• Country of manufacture: United Kingdom.
• Manufacturer: UNDERSEA Centre Ltd, Southampton, UK.

Recommended uses

Designed for technical diving professionals and dive facility operators, this adapter connects JIC-standard flexible hoses — widely used on US-manufactured compressor outlets, portable gas analysers (oxygen, helium) and fill whips — to the G1/4 BSP ports found on blending panels, cascade systems, manifold blocks and cylinder fill station distribution rails. It is equally suited to retrofit and expansion projects where JIC-to-BSP conversion is required within existing nitrox, trimix, heliox or high-pressure air systems at BSAC dive clubs, commercial diving support vessels and professional training centres throughout the UK and Europe.

Key strengths

• 316 A4 marine stainless steel: chrome-molybdenum austenitic alloy with maximum resistance to saltwater, humid gas and saline atmospheres — superior longevity over standard steel fittings.
• Dual international thread standards: JIC-6 (SAE J514 / North American) × G1/4 BSP (ISO 228-1 / European) — full hardware compatibility across equipment from different manufacturing traditions.
• Precision-machined 37° JIC cone: reliable metal-to-metal seal under sustained pressure cycling, no thread degradation in demanding fill station environments.
• British Standards + DIN manufacturing: stringent production controls for professional gas facility and high-pressure diving applications.
• UNDERSEA Centre expertise since 1979: trusted source for dive facility fittings across the UK, Europe and worldwide.

Guarantees and standards

Manufactured by UNDERSEA Centre Ltd to British Standards and applicable DIN specifications for pressurised fluid connectors. This adapter is a gas facility infrastructure component — not a personal protective equipment (PPE) item. Always verify suitability for your specific working pressure and confirm use of oxygen-compatible lubricants and seals where oxygen service applies.