Skip to content
Foster 6FFSDC, 1/4" FF Plus Socket Dust Cap, FF Plus Series, PVC

Foster FF12CUPP-08, 1/2" Flat Face Connect-Under-Pressure Hydraulic Plug x 1/2" Female NPT, FF Plus Series, Nickel-Plated Steel

by Foster
Save 20% Save 20%
$ 144.09
$ 144.09 - $ 144.09
$ 144.09
$ 115.29
$ 115.29 - $ 115.29
$ 115.29

Premium flat-face hydraulic connections that stay clean and lose virtually no fluid. The Foster FF12CUPP-08 is a nickel-plated steel 1/2" plug from the FF Plus Series — Foster's upgraded flat-face line built to ISO 16028, rated to 5075 PSI. The flat faces wipe clean, include almost no air on connection, and spill almost no oil on disconnect.

Specifications

  • Brand: Foster
  • Series: FF Plus (Flat Face, ISO 16028)
  • Part Number: FF12CUPP-08
  • ISO 16028 Size: 12
  • Interchange: 1/2" ISO 16028 Flat Face
  • Body: 1/2" Plug
  • Thread: 1/2" Female NPT, FPT
  • Type: Flat Face, no-spill / no air inclusion
  • Special: Connect Under Pressure (CUP) - connects with residual line pressure
  • Flow: Bidirectional
  • Material: Nickel-Plated Steel
  • Seal: Nitrile std (Viton available)
  • Max Working Pressure: 5075 PSI
  • Corrosion: Tested 1,200 hrs salt spray (no white/red rust)
  • Temperature: Nitrile -40 to 223F; Viton -4 to 392F
  • Standard: ISO 16028, tested to ISO 7241-2
  • Quantity: 1pc
  • Origin: Made in USA

Why this plug

  • Flat face, no-spill design — which means virtually no fluid loss on disconnect and minimal air inclusion on connect, keeping systems clean.
  • Flat faces wipe clean — which means you can wipe both halves before connecting, critical in dirty field environments.
  • Bidirectional flow — which means oil can flow either direction through the coupling.
  • Safety locking sleeve — which means protection against accidental disconnection under load.
  • 1,200-hour salt-spray tested — which means proven corrosion resistance with no white or red rust.
  • Zinc-nickel plated carbon steel — which means a tough, corrosion-resistant body at a working-tool price point.
  • Connect Under Pressure — which means it can be connected even when residual pressure is trapped in the line, eliminating frustrating no-connect situations.

Frequently asked questions

What does this connect to?
It meets ISO 16028 flat face and connects with matching 1/2" FF Plus sockets.

What pressure is it rated for?
Rated to 5075 PSI maximum working pressure.

Why a flat/flush face?
Flat-face couplers spill almost no oil on disconnect and include almost no air on connect, and the faces wipe clean — ideal for keeping hydraulic systems contamination-free.

Pair this plug with a matching 1/2" FF Plus socket for a complete connection. Ideal for portable hydraulic tools, construction and utility equipment, and field maintenance.

Why FF Plus vs standard flush face: The FF Plus line is the upgraded option — offered in both nickel-plated steel and 316 stainless, with bidirectional flow, a Connect-Under-Pressure option, and 1,200-hour salt-spray corrosion testing. It exceeds the basic flush-face spec while remaining ISO 16028 intermateable.

Why buy from hpcouplers: Foster quality, responsive US-based support, accurate specs, fast shipping.