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Bulgin Brass AS 2473.2 Cylinder Nut and Stem Sets — 90 mm connect compatible gas cylinders to regulators, manifolds and gas distribution equipment. Select the cylinder connection type for the required gas service; the nut, stem and sealing details are listed for each option below.
High-performance cylinder inlet connections from Bulgin Gas Equipment , designed and engineered to AS2473.2 specifications for safe, reliable high-pressure gas handling. Available in durable brass or corrosion-resistant stainless steel, these fittings ensure secure, leak-tight performance for industrial, medical, and laboratory gas systems.
Features and applications
- Designed to AS2473.2 for high-pressure gas cylinder connections
- Precision-machined brass or stainless steel for strength and long service life
- Leak-tight sealing for safe gas inlet applications
- Suitable for regulators, manifolds, filling systems & gas distribution equipment
- Compatible with common industrial and specialty gas standards
- Stem includes machined flats to suit 12mm spanner for easier fitment
- Includes Inline Filter to remove particulate contaminants
Shared specifications
| Specification | Details |
|---|---|
| Length | 90mm |
Available variants
| SKU | Cylinder connection | Material | Nut | Stem | Hex nut | Thread | Connection standard | Gas suitability |
|---|---|---|---|---|---|---|---|---|
| 547-25001 | Type 10 | Brass and Viton O-Ring | 5/8” BSP RH Internal, 14 T.P.I. | Internal angled sealing face, thread I.D, 21.0mm | 11/16" | 1/4" NPT | AS2473.2 Type 10 | Type 10 suitable for oxygen, helium, argon, non-flammable non-toxic mixtures |
| 547-25003 | Type 20 | Brass and Viton O-Ring | 5/8” BSP LH Internal, 14 T.P.I. | Internal angled sealing face, thread I.D, 21.0mm | 11/16" | 1/4"" NPT | AS2473.2 Type 20 | Type 20 suitable for acetylene, carbon monoxide, ethane, ethylene, hydrogen, methane, flammable gases, flammable non-toxic mixtures |
| 547-25005 | Type 30 | Brass | Nut: 0.860” WHIT RH, 14 T.P.I. | Flat end sealing face, thread O.D. 21.8mm | 11/16" | 1/4" npt | AS2473.2 Type 30 | Type 30 suitable for carbon dioxide, nitrous oxide |
| 547-25013 | Type 21 | Brass | 11/16" | Internal angled sealing face, thread I.D. 21.0mm | Not stated | 1/4" npt | AS2473.2 Type 21 | Type 21 suitable for LPG |
Variant-specific features
| Feature | Applies to SKU |
|---|---|
| Bulgin designed Seal-Lok Retaining Screw to lock the seal in place on the stem. | 547-25005 |
Specifications
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