Western Enterprises 663 Oxygen Regulator Inlet Nipple 1/4 Npt

Product Description

The WESTERN ENTERPRISES 663 is a regulator inlet nipple designed for oxygen service. It provides a secure, leak-resistant connection between an oxygen cylinder regulator and the downstream system. Constructed from brass, this nipple meets CGA-540 fitting standards and installs hand-tight, requiring no tools for make-up. At 2.5 inches in length with a 1/4 inch NPT thread, it is a compact, purpose-built component used by welding professionals, medical gas technicians, and industrial gas service personnel working with high-pressure oxygen regulators.

This inlet nipple is suited for use in industrial, laboratory, and medical oxygen gas systems wherever a CGA-540 regulator connection is required. It is commonly installed during regulator service, cylinder changeouts, or system assembly where a fresh or replacement inlet fitting is needed. The hand-tight design speeds up routine connections and disconnections in high-turnover service environments. Sold individually, it is appropriate for bench stock or field replacement kits maintained by gas equipment service technicians.

Key Features

• CGA-540 fitting standard for oxygen cylinder regulator connections
• 1/4 inch NPT thread for compatibility with standard regulator inlet ports
• Brass construction provides corrosion resistance in oxygen service environments
• Hand-tight installation eliminates the need for wrench make-up
• 2.5 inch length suits standard regulator inlet configurations
• Lightweight at 0.1 pounds, suitable for field and bench stock kits

Compatibility

Designed as an OEM-style replacement inlet nipple for oxygen regulators using CGA-540 cylinder connections with 1/4 inch NPT inlet porting.

Installation Notes

Installation should be performed by a qualified gas equipment technician familiar with high-pressure oxygen system safety. Always confirm the cylinder valve is fully closed and the system is fully depressurized before removing or installing any regulator fitting. Oxygen service fittings must be kept free of oil, grease, and hydrocarbon contamination at all times, as these substances present a serious ignition hazard in oxygen-enriched environments. Follow applicable Compressed Gas Association guidelines and any local codes governing oxygen cylinder handling and regulator service.

Technical Specifications

• Thread Size: 1/4 inch NPT
• Length: 2.5 inches
• Material: Brass
• CGA Fitting: CGA-540
• Installation Type: Hand Tight
• Gas Service: Oxygen
• Weight: 0.1 pounds
• UPC: 698944071752

Standard Information

• Brand: WESTERN ENTERPRISES
• Manufacturer Part Number: 663