Aerox FA-AN4M-PB3 Filling Adapter – AN4M to PB3
The Aerox FA-AN4M-PB3 Filling Adapter enables transitions from AN4M connections to Puritan Bennett PB3 fittings. Used in both military and custom aircraft installations, this adapter facilitates oxygen servicing where traditional CGA fittings aren’t used.
Key Features
- Adapts AN4M fittings to PB3 fill ports
- Supports niche and legacy oxygen system interfaces
- Compact and durable for rugged aviation use
- Ideal for specialized aircraft, military, or test platforms
When standard fittings aren’t an option, the Aerox FA-AN4M-PB3 ensures mission-ready performance and seamless oxygen connectivity.
| General Information | |
|---|---|
| Part # | FA-AN4M-PB3 |
| Manufacturer | Aerox |
| Shipping Information | |
|---|---|
| Product Weight | 0.2 lbs. |
| Product Dimensions | 5.5 x 1 x 1 in. |
| Specifications | |
|---|---|
| Dimensions | 2x3x4 in |
| Weight | 2 lbs |
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AIRCRAFT COMPATIBILITY
| Compatible Aircraft* |
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PRODUCT REVIEWS
QUESTIONS & ANSWERS
The FA-AN4M-PB3 filling adapter facilitates a seamless transition from a male AN4M fitting to a Puritan–Bennett PB3 fill port, allowing for streamlined oxygen cylinder servicing on aircraft that require non-CGA connections. With a rugged construction and aviation-grade materials, it ensures secure high-pressure oxygen transfers in demanding environments. This simplifies fill station setups when legacy or military-style fittings are present.
This adapter is designed for use with Puritan-Bennett style PB3 fill ports on aviation oxygen systems when the source uses a male AN4M connection – commonly found in military, custom, or retrofitted aircraft. Operators and FBOs servicing such installations can rely on the FA-AN4M-PB3 to safely and efficiently bridge incompatible interfaces.
The FA-AN4M-PB3 features a male AN4M connector on one end (feeding from the supply source) and a female PB3 fitting on the service side (connecting to the aircraft or oxygen cylinder). This pin-compatible arrangement enables operators to quickly convert from AN4M to PB3 without custom fabrication, thereby reducing the risk of misconnection and downtime.
While CGA 540 is common for many aviation oxygen fill systems, some aircraft use specialized AN4M or PB3 standards that differ in port size, thread style, or sealing. The FA-AN4M-PB3 accommodates those niche interfaces – making it especially useful for military conversions, retrofit tanks, or FBOs servicing mixed-fleet operations where multiple fill standards must be supported.
By eliminating the need for custom fittings or interim hoses, the FA-AN4M-PB3 streamlines the adapter chain, reduces setup time, and ensures a single certified component can cover AN4M-to-PB3 service. Its compact, rugged design helps maintenance crews or flight-line personnel execute oxygen fills faster with less equipment swapping, enhancing aircraft turnaround.
Technicians should routinely inspect the adapter for thread damage, seal wear, and clean internal bore surfaces before each service use. Confirm that the AN4M male threads engage smoothly and that the PB3 fitting locks securely with no leaks. Storage in a protective pouch and avoiding abrasive environments prolongs the life and maintains a reliable fit.
No formal calibration is required because the adapter is a passive fluid-fitting component (not an instrument). However, it should be logged in the facility’s adapter inventory and checked for visual and mechanical integrity as part of regular oxygen-service equipment audits. Damaged or non-conforming adapters should be removed from service.
As part of the Aerox filling adapter series, the FA-AN4M-PB3 is constructed to handle typical aviation oxygen cylinder fill pressures (often in the 1800–2200 psi range) and high-flow transfer events. While exact published flow characteristics may not be listed, its service in oxygen-filling cascades and FBO systems confirms suitability for heavy-use aviation ground support.
Yes. Always ensure that all fill equipment is rated for oxygen service and is free from hydrocarbon contamination, oil, and lint. Verify ground connection, venting, and correct orientation of the adapter between AN4M and PB3 ports. Follow the aircraft’s approved maintenance manual and ensure the adapter threads are fully engaged to prevent leaks or uncontrolled release of high-pressure oxygen.
