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DANFOSS / EATON/HANSEN CPLNG

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Description & Features

Designed for oil and gas applications, this carbon steel male half plug from the Danfoss / Eaton Hansen HKFR Series Quick Disconnect Couplings line features a push-to-connect male end paired with a 3/4" NPTF female port. The ball lock internal connection and sleeve lock safety mechanism provide secure engagement without the need for special tools, supporting a rated flow of 17.5 gallons per minute across a working temperature range beginning at -40°F.

Buna-N seals offer broad fluid compatibility, and the two-way valve design allows bidirectional flow control. Certified to ISO 7241-1 Series B and Lloyd's Register standards, this coupling meets or exceeds ISO 16028 operating pressures, making it well-suited to demanding fluid power circuits in the oil and gas sector. The Hansen sub-brand carries Aeroquip lineage, reflecting long-standing engineering standards in high-performance quick disconnect solutions.

SKU: 6KFR31

Supplier Part Number (MPN): 6KFR31

Specifications

Brand
Aeroquip® by Danfoss
Connection Size 1
3/4 in
Connection Size 2
3/4 in
Connection Style
Manual
Connection Type
FNPT, Push-Fit
Connection Type 1
Male Push-to-Connect
Connection Type 2
Female NPTF
Dimension Standards
ISO 7241-1 Series B
Dimensions
1.52 in Dia x 2.36 in L
Finish
Zinc Trivalent
Fitting Type
Coupling
Fluid Compatibility
Hazardous Oil and Gases
Hex Size
1.312 in
Internal Connection Type
Ball Lock
Latch Type
Push/Pull
Material
Steel
Material Construction
Carbon Steel
Maximum Operating Pressure
5000 psi
Operating Temperature
-40 to 250 deg F
Safety Locking Mechanism
Sleeve Lock
Seal Material
NBR
Segment Code
C
Series
HKFR Series
Thread Size
3/4-14
Valve Type
2-Way

Product Questions & Answers (1)

Question by: Cody W on Feb 27, 2026, 8:59 PM
reckon this'll hold up okay in a hydraulic setup for some heavy machinery? We're pushing it pretty good most days.
Answer by: Customer Support on Mar 1, 2026, 9:07 AM
It's built for demanding fluid power circuits like you'd find in oil and gas, and exceeds ISO 16028 operating pressures, so it should be up to the task as long as you're not exceeding the rated flow of 17.5 gallons per minute.

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