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
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Specifications
Alternate Part Numbers
Alternate Part NumberMINO-00015X13697
Application
Breathing equipment, Welding, Shipyards, General pneumatic, Constructon, Nitrous Oxide
Compliances
OSHA Compliant
Brand
Danfoss Power Solutions (II LLC Aeroquip)
Brand
Aeroquip
Pack Size
1.00
UOM
EA
End Gender 1
13553
End Gender 2
13556
End Size 2
0.25
End Type 1
Push to Connect
End Type 2
NPTF
Features
Quick connect and disconnect|No need for special tools|Exceeds ISO 16028 operating pressures
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.