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5100 Series Low Spill Connect Under Pressure Quick Disconnect, Male Half, -12 Coupling, 3/4-14 Female Pipe

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Description & Features

The Danfoss / Eaton Hansen 5100 Series Quick Disconnect Couplings Plug is expertly engineered for hydraulic and fluid transfer applications, including on-highway hydraulic wet lines and bulk liquid transfer.

The tubular valve design ensures minimal fluid loss during disconnection, enhancing environmental and worker safety. The quick disconnect couplings plug features a low air inclusion rate of 0.34 cubic centimeters, maintaining optimal system performance. This product can connect under pressure, handling up to 500 psi, making it ideal for demanding environments.

Available in configurations with wing or hex nuts, this coupling includes options for steel flange mounting to facilitate accessible bulkhead installations. The standard materials used are brass with steel valving components, while the seal material is durable Buna-N. Additionally, the couplingrsquo;s end types include UNF and NPTF, with threads measuring 3/4-14 on the female pipe end.

The low spill connect under pressure quick disconnect is designed without thread sealant, accommodating a range of seal materials including Vitonreg; and EPR. This valve type is a robust and reliable 2-way system.

MPN: 40183100

Supplier Part Number: 5100-S2-12B

Specifications

A
3.11
Air Inclusion Max
0.34 Cubic_centimeter
Application
Hydraulics and fluid transfer, On-highway hydraulic wet lines, Dump and refuse vehicles, Bulk liquid transfer
B
1.38
Coupling Size
-12
Brand
Danfoss Power Solutions (II LLC Aeroquip)
Brand
Aeroquip
Pack Size
1.00
UOM
EA
End Gender 1
13554
End Gender 2
13555
End Size 2
0.75
End Type 1
UNF
End Type 2
NPTF
Fluid Loss
0.26 Cubic_centimeter
Minimum Working Temperature
-40
Seal Material
Buna-N
Supplier Part Number
5100-S2-12B
Thread 1
3/4-14
Thread Sealant
No
Alternate Part Numbers
Alternate Part Number C1BS54, Alternate Part Number MI-00297984, Alternate Part Number MINO-00015F46476, Alternate Part Number MINO-00925X11340
Product Weight
0.78 lbs

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Product Questions & Answers (4)

Question by: Rex C on Mar 14, 2026, 11:38 AM
does this thing actually connect when there's already pressure in the line, or do I have to bleed it down first?
Answer by: Customer Support on Mar 16, 2026, 10:10 AM
You can connect it while the line is pressurized, up to 500 psi. That's one of the main reasons folks reach for this series in working hydraulic setups where shutting things down to make a connection isn't practical. Just keep in mind that ceiling is 500 psi for the connect-under-pressure feature, so if your system runs hotter than that at the moment of connection, you'd want to manage pressure accordingly before hooking up.
Question by: Travis C on Jan 8, 2026, 11:47 AM
trying to swap out a plug on a wet line, what threads are on this male half?
Answer by: Customer Support on Jan 10, 2026, 6:36 AM
The plug has a 3/4-14 female pipe thread (NPTF) on the pipe end, and it’s a -12 coupling size in the 5100 Series.
Question by: Gene S on Aug 9, 2025, 8:26 PM
connecting this thing while the system's still pressurized -- is that actually doable or do i need to bleed everything down first?
Answer by: Customer Support on Aug 11, 2025, 6:28 AM
You can connect it under pressure, up to 500 psi. That's one of the main reasons this coupling gets used on dump trucks and refuse vehicles where bleeding the system every time just isn't practical. The tubular valve design keeps fluid loss to a minimum during that process, so you're not making a mess or losing much product when you make the connection hot.
Question by: Lee W on Feb 25, 2026, 7:24 AM
Will this quick disconnect hold up okay in a hydraulic wet line setup on my truck?
Answer by: Customer Support on Feb 26, 2026, 2:43 PM
It's designed for on-highway hydraulic wet lines, as well as fluid and bulk liquid transfer.

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