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Danfoss / Eaton Hansen and Gromelle GR603 Socket Brass 1/4-18 IN NPTF Male 1/4 IN Body Size

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Description & Features

The Danfoss / Eaton Hansen and Gromelle GR603 Socket is a robust solution for demanding industrial applications, including breathing equipment, welding, and shipyards. Constructed from durable brass, this quick disconnect coupling features a 1/4-18 IN NPTF male end and a 1/4 IN body size, ensuring reliable performance under pressure. Its ball lock internal connection type facilitates seamless quick connect and disconnect use without the need for special tools, while the sleeve lock safety mechanism enhances security. Designed to exceed ISO 16028 operating pressures, this coupling is OSHA compliant, making it a dependable choice for various pneumatic and construction needs.

SKU: GR603

Supplier Part Number (MPN): GR603

Specifications

Brand
Danfoss
Color
Green
Connection Size 1
1/4 in
Connection Size 2
1/4 in
Connection Style
Manual
Connection Type
MNPT
Connection Type 1
Male NPTF
Connection Type 2
Male NPTF
Dimensions
2.03 in L x 1 in W x 1 in H
Finish
Nickel-Plated
Fitting Type
Coupling
Fluid Compatibility
Gases, Oxygen Service, Compressed Air and Other Gases
For Use With
Compressed Air and Other Gases
Hex Size
11/16 in
Latch Type
Push/Pull
Material
Brass
Material Construction
Brass
Maximum Operating Pressure
1500 psi
Operating Temperature
-40 to 250 deg F
Safety Locking Mechanism
Sleeve Lock
Seal Material
NBR
Series
600 Series
Thread Size
1/4-18
Valve Type
2-Way

Product Questions & Answers (2)

Question by: Daryl P on Nov 2, 2025, 3:57 PM
trying to swap out an old Hansen socket, is this GR603 the female half with a 1/4-18 NPTF male thread?
Answer by: Customer Support on Nov 3, 2025, 6:02 PM
Fit-wise, GR603 is the socket (female half) and it has a 1/4-18 IN NPTF male pipe thread on the end, with a 1/4 IN body size.
Question by: Gary R on Nov 5, 2025, 6:47 PM
What kind of thread is on this fitting, and will it seal up tight without a bunch of extra tape or sealant?
Answer by: Customer Support on Nov 7, 2025, 1:57 PM
The male end on this coupling is 1/4-18 NPTF, which is a dryseal pipe thread. NPTF threads are engineered to form a pressure-tight seal through metal-to-metal contact, so under normal installation conditions you get a reliable seal without relying heavily on tape or compound. That said, many techs still apply a light amount of thread sealant out of habit on pneumatic fittings, and there's nothing wrong with that approach either.

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