The Danfoss / Eaton SAE 45 Flare Union is designed for a variety of applications including instrumentation refrigeration power steering hydraulic and pneumatic systems. This brass adapter features a 5/8-18 Male SAE 45 flare on both ends which ensures a secure and reliable connection.
Constructed from high-quality brass this adapter offers durability and resistance to corrosion making it suitable for use with LP and natural gas as well as flammable liquids (special order).
The male fittings on both ends provide a dependable seal without the need for thread sealant. Measuring 0.625 inches for end size 1 and end size 2 with a tube O.D. of 0.375 inches this adapter is precise and reliable.
**MPN:** EAR99 **Supplier Part Number:** 42X6
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Specifications
Alternate Part Numbers
Alternate Part NumberC1HP90
Application
Other - LP and natural gas, flammable liquids (special order), instrumentation, refrigeration, power steering, hydraulic and pneumatic systems
Does this fitting work for both refrigeration and hydraulic lines, or is it more of a one-or-the-other situation?
Answer by: Customer Support on Jul 6, 2025, 9:00 AM
Both are fair game with this one. The 42X6 union is rated for refrigeration, hydraulic, and pneumatic systems, along with instrumentation and power steering applications. The brass construction holds up well across those uses, and the 5/8-18 SAE 45 degree flare on both ends gives you a solid metal-to-metal seal so you're not relying on thread sealant to keep things tight.