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Adapter 21.8 female to Bullnose (UK) female

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  • Adapter 21.8 female to Bullnose (UK) female

Helium Female UNDERSEA Bullnose UK Adapter

€70.50 tax incl. ( 58,75 € tax excl. )
Availability:
In stock
Reference:
92277

UNDERSEA 1074-1080BN helium adapter connects a helium female port (W 24.32x14 LH, DIN 477-10) to a UK Bullnose female connection (G5/8, BS 341-3) for high-pressure gas transfer in technical diving.

✓ Chrome-plated brass · BS 341-3 UK Bullnose · DIN 477-10 · UK-manufactured since 1970

Designed for Trimix blending stations, helium cascade systems, and professional technical dive workshops.

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Return possible within 14 days for private customers.

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Founded in Southampton in 1970, UNDERSEA Ltd has spent over five decades designing and manufacturing high-pressure gas fittings for the professional diving and mixed-gas industry. The 1074-1080BN compound fitting bridges a helium female port (W 24.32x14 LH thread, DIN 477-10) to a UK Bullnose female connection (G5/8 thread, BS 341-3 Type 3), providing a reliable interface between two internationally recognised gas cylinder standards used by technical diving teams and commercial operations worldwide.

Technical Specifications

  • Manufacturer reference: 1074-1080BN
  • Inlet connection: helium female, W 24.32x14 LH thread — DIN 477-10
  • Outlet connection: UK Bullnose female, G5/8 thread — BS 341-3 Type 3
  • Material: high-quality brass with chrome-plated finish
  • Working pressure: high-pressure service — standard helium fill 200 bar (per DIN 477-10 / BS 341-3)
  • Dimensions: 10 × 5 × 5 cm
  • Weight: 0.9 kg
  • Country of manufacture: United Kingdom (Southampton, SO14 5GZ)
  • Assembled to order by UNDERSEA Ltd

Applications

This high-pressure fitting is purpose-built for helium cascade systems and gas blending stations used in technical diving with Trimix, Heliox, and Heliair mixtures. It connects equipment fitted with a DIN 477-10 helium female port — manifolds, fill whips, pressure regulators, or blending panels — to helium storage cylinders fitted with UK Bullnose (BS 341-3) valves. Widely specified in technical dive centres, commercial facilities, and rebreather service workshops across the UK, Australia, and wherever the BS 341-3 standard applies. Essential kit for any mixed-gas operation handling helium in Trimix or Heliox blending.

Key Features

  • Bridges two globally accepted standards: DIN 477-10 helium thread (W 24.32x14 LH) and BS 341-3 UK Bullnose (G5/8), covering the UK, Australia, Asia, the Middle East, and parts of Africa
  • Chrome-plated brass construction: resists corrosion in humid, salt-rich environments of professional dive centres and gas filling facilities
  • UNDERSEA assembled-to-order manufacturing: precision tolerances maintained through more than five decades of gas fitting expertise
  • Designed to British and DIN standards for verified international compatibility and long-term reliability
  • Durable workshop fitting: low maintenance and extended service life under high-pressure mixed-gas conditions

Certification and Quality

This adaptor conforms to BS 341-3 (connections for transportable gas cylinders — UK Bullnose Type 3, 60° cone seat, G5/8 thread) and DIN 477-10 (W 24.32x14 LH helium thread). UNDERSEA Ltd designs all products to British and DIN standards from its Southampton manufacturing facility. This is an industrial gas fitting — no PPE (personal protective equipment) certification applies. Responsibility for compatibility with the specific gas installation rests with the qualified technical operator.

→ our guide on non-PPE diving equipment

92277

Data sheet

Connection
Bullnose UK Female
Connection
Helium Female (Type C)

Specific References

Manufacturer reference
1074
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