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HK Series Industrial Interchange Series B Steel Hydraulic Quick Disconnect, Female Half, -12 Coupling, 3/4-14 Female NPT

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Description & Features

The Danfoss / Eaton Hansen HK Series Quick Disconnect Couplings Socket is designed for effective fluid transfer applications across multiple industries such as agriculture, hydraulics, construction, and aerospace. Its self-sealing poppet valve ensures reliable sealing under both high and low pressures. The standard Buna-N seal material can withstand temperatures ranging from -40deg;F to +250deg;F, with additional options available in PTFE, Neoprene, FKM, EPDM, and Kalrezreg;.

Meeting the dimensional requirements of ISO standard 7241-1 Series B, this coupling offers a dependable solution for fluid loss, with a maximum of 9.30 cubic centimeters. The unit features a 3/4-14 NPTF thread and a female push-to-connect end type, providing secure and efficient connections. The coupling size is ideal for versatile applications, ensuring minimal air inclusion, capped at 11.50 cubic centimeters.

Commonly utilized in segments such as transportation, military, chemical, oil and gas, HVAC, food and beverage, trucks, and medical devices, this quick disconnect coupling is a versatile, high-performance component.

ECCN: EAR99

Supplier Part Number: 6HP31

Specifications

A
3.48
Air Inclusion Max
11.50 Cubic_centimeter
Application
Agriculture, Hydraulic Tool, General Industry, Construction, Fluid Transfer, Transportation, Military, Law Enforcement/Rescue, Chemical, Oil and Gas, Consumer Products, HVAC, Food and Beverage, Trucks, Aerospace, Medical
B
2.22
Coupling Size
-12
Brand
Danfoss Power Solutions (II LLC Aeroquip)
Brand
Aeroquip
Pack Size
1.00
UOM
EA
End Gender 1
13553
End Gender 2
13555
End Size 1
0.75
End Size 2
0.75
End Type 1
Push to Connect
End Type 2
NPTF
Fluid Loss
9.30 Cubic_centimeter
Minimum Working Temperature
-40
Safety locking Mechanism
None
Seal Material
Buna-N
Supplier Part Number
6HP31
Thread 1
3/4-14
Thread Sealant
No
Alternate Part Numbers
Alternate Part Number C1LX46, Alternate Part Number MI-06098067, Alternate Part Number MINO-00015X00457
Product Weight
1.34 lbs

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Product Questions & Answers (4)

Question by: Debbie S on Jan 25, 2026, 4:18 PM
Will this quick disconnect work alright with hydraulic tools?
Answer by: Customer Support on Jan 27, 2026, 6:59 AM
Absolutely. This HK Series quick disconnect is commonly used in hydraulic tool applications, along with general industry, construction, and agriculture.
Question by: Peggy B on Jul 23, 2025, 4:06 PM
What kind of applications is this fitting generally used for?
Answer by: Customer Support on Jul 25, 2025, 11:38 AM
This Eaton HK series quick disconnect is commonly found in fluid transfer applications within agriculture, construction, aerospace, and general industry. It also sees use in transportation, military, chemical, oil and gas, HVAC, food and beverage, trucks, and medical devices.
Question by: Hugh A on Oct 1, 2025, 12:14 PM
what seal material comes standard on this coupling, and is it gonna hold up runnin hydraulic fluid in cold weather?
Answer by: Customer Support on Oct 3, 2025, 10:47 AM
Buna-N is the standard seal on this one, and it covers a range of -40°F up to +250°F. For most hydraulic fluid applications in cold operating conditions, that range holds up well. If your setup pushes past those limits in either direction, there are alternative seal options available including PTFE, Neoprene, FKM, EPDM, and Kalrez, each rated for different temperature windows depending on what your system demands.
Question by: Dean M on Mar 21, 2026, 2:42 PM
got an old Series B coupler on a hose, is this the right female half if i need a -12 with 3/4-14 female pipe threads?
Answer by: Customer Support on Mar 23, 2026, 6:00 AM
Match-up comes down to two things here: it is a Series B (ISO 7241-1 Series B) female socket, and the threaded end is 3/4-14 NPTF female. It is also a -12 coupling size, with a female push-to-connect end on the mating side.