Hydraulic & Pneumatic Systems
Parker Hydraulics and Pneumatics Ltd, Unit 5, Ashbourne Estate, Mile Cross Lane, Norwich, NR6 6RY

4879HQ Quick Release Couplings.

Holmbury Quick Release Couplings


Here at Parker Hydraulics and Pneumatics Ltd, we stock a wide variety of sizes of Holmbury’s range of HQ Quick Release Couplings which are all available on our same day despatch service throughout the United Kingdom. As an official distributor, we are able to source these products quickly and cheaply in comparison to our competitors.

HQ flat face series couplings are designed for use in excavator hammer circuits and other applications involving high pressure pulses such as construction plants, mobile equipment, general industrial use, nuclear, mining and agricultural. They are suitable for applications involving dusty or dirty environments where oil loss on disconnection cannot be tolerated.

HQ series conform to ISO 16028 (2006) in all respects, i.e. dimensions and performance.

Key Features:

  • Flat mating faces are easily wiped clean to prevent the ingress of contamination
  • Improved flow path minimises the pressure drop
  • Non-spill design avoids fluid loss during connection and disconnection
  • No air intrusion during connection
  • Locking sleeve prevents accidental disconnection
  • Zinc nickel surface treatment eliminates chrome 6 and exceeds 200 hour salt spray tests to white rust

Material: Carbon steel body, treated to increase hardness and corrosion resistance. H series couplings are Trivalent plated.

For further information relating to this product or any of our other ranges, please call us on 01603 403 190, or alternatively, email us at sales@parkerhydraulics.co.uk today to request a free quotation or to purchase this item.


Body Size Our Part Number(Male Probe) Our Part Number(Female Carrier) Nominal Diameter Thread Size (“) Max Working   Pressure (Bar)
HQ06 HQ06-M-04G HQ06-F-04G 6 mm 1/4″ 400
HQ10 HQ10-M-06G HQ10-F-06G 10 mm 3/8″ 375
HQ10 HQ10-M-08G HQ10-F-08G 10 mm 1/2″ 375
HQ12 HQ12-M-08G HQ12-F-08G 12 mm 1/2″ 350
HQ12 HQ12-M-12G HQ12-F-12G 12 mm 3/4″ 350
HQ16 HQ16-M-12G HQ16-F-12G 16 mm 3/4″ 350
HQ19 HQ19-M-12G HQ19-F-12G 19 mm 3/4″ 350
HQ19 HQ19-M-16G HQ19-F-16G 19 mm 1″ 350
HQ25 HQ25-M-20G HQ25-F-20G 25 mm 1 1/4″ 315
H32 H32-M-24G H32-F-24G 32 mm 1 1/2″ 250
H40 H40-M-32G H40-F-32G 40 mm 2″ 250

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