Hose nozzle DIN300b female - G1/4 female

Since 1970, UNDERSEA Centre Ltd has supplied the diving industry with precision-engineered high-pressure fittings, valves and adaptors built to British and DIN standards. The 1080-BHP MK.2 is the 300 bar member of the 1080 adaptor family, designed to bridge the DIN cylinder valve interface — the G5/8×14 thread defined by EN 144-1 — to any G1/4 female port in a fill station, blending panel or instrumentation setup. The MK.2 designation reflects a second-generation refinement of the original MK.1 body, with tighter machining tolerances for consistent sealing across repeated high-pressure cycles.

Technical specifications

• Manufacturer reference: 1080-BHP MK.2
• Inlet thread: G5/8-14 female DIN — EN 144-1 (thread connections for gas cylinder valves for underwater breathing apparatus)
• Outlet thread: G1/4 female (G1/4 BSPP)
• Maximum working pressure: 300 bar
• Material: brass
• Version: MK.2 — second generation (refined from 1080-BHP MK.1)
• Supply condition: body assembled to order
• Manufacturer: UNDERSEA Centre Ltd, United Kingdom — diving valves and fittings since 1970

Recommended uses

The 1080-BHP MK.2 is at home wherever a DIN 300 bar cylinder valve must interface with G1/4 threaded instrumentation or hose connections: bank pressure gauges, oxygen or Nitrox analysers, high-pressure fill hoses, digital pressure transducers, or inlet and outlet ports on multi-cylinder manifolds. It serves technical dive centres across the UK and Europe, Nitrox and Trimix blending stations, private fill setups run by advanced and cave divers, and service technicians managing high-pressure valve assemblies. UNDERSEA's deep roots in British cave and wreck diving — from the Mendip Hills to the English Channel wrecks — underpin the practical engineering of each fitting in this range.

Key strengths

• Precision brass body: G5/8×14 and G1/4 threads machined to EN 144-1 tolerances — gas-tight seal at 300 bar without the extra weight and cost of an oversized casting
• MK.2 second generation: continuous improvement over the original MK.1 design — refined machining for more consistent thread engagement and leak-free performance under repeated field use
• Universal G1/4 outlet: matches the vast majority of high-pressure gauges, analysers, sensors and fill hoses from all major diving and industrial manufacturers worldwide
• Diving-exclusive expertise: UNDERSEA has supplied only the diving industry since 1970 — every dimension is sized for breathing-gas high-pressure systems, not adapted from a generic industrial catalogue
• Direct factory dispatch: 2–3 working days from the UK manufacturer — a critical replacement or installation component reaches you quickly to minimise fill station downtime

Warranty and specifications

The UNDERSEA 1080-BHP MK.2 is manufactured to applicable British and DIN standards for high-pressure diving fittings. The G5/8 inlet thread complies with EN 144-1 (thread connections for gas cylinder valves for underwater breathing apparatus), the European benchmark for DIN-compatible diving equipment. The 300 bar working pressure rating covers all high-pressure technical diving cylinders in current use. The brass body (CW614N alloy) is compatible with Nitrox up to 40 % O2 without special preparation. For pure oxygen service, O2-clean assembly by a qualified technician is required.