We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Alphacool HF quick-release bulkhead coupling set in black nylon with two G1/4 male threads

Alphacool

Alphacool HF Quick Release Coupling Set IT/IT Bulkhead Nylon Black 17599

SKU CH-F95C-KVSCN

Quick-disconnect bulkhead fitting set mounts in 18 mm case holes for tool-free external radiator hookup

  • TypeFittings
  • Tool-free external radiator swaps via screw-on quick disconnects
  • Secure screw-cap locking prevents accidental disconnection under pressure
  • Permanent 18 mm bulkhead mount integrates cleanly into case panels
  • Dual G1/4″ internal threads route coolant internally without adapters
  • Compatible with Alphacool HF connector kits for expanded loop options

Quick-Release Bulkhead Coupling Set

The Alphacool HF quick-release coupling set IT/IT is a bulkhead fitting designed for permanent mounting on a PC or server case. It enables quick connection or disconnection of externally connected radiators or cooling systems. The set uses two male G1/4" threads for internal water-circuit connections and suits builders who need a secure, detachable external loop interface. Buyers who require angled or rotary fittings will need a different product.

Installation Steps and Common Issues

Mount the male and female connectors through two 18 mm diameter openings in the case and secure them with the enclosed lock nuts. Connect the internal water circuit to the G1/4" internal threads on the inside of the case. The couplings use a screw-on cap nut rather than a click mechanism to prevent accidental unlocking. Over-tightening the nylon lock nuts can strip the threads, so apply moderate force during assembly.

Sustained-Load Behaviour

The screw-on cap nut maintains a firm seal under continuous system pressure and vibration, reducing the risk of leaks during extended operation. Nylon construction resists corrosion from coolant additives over long periods. The bulkhead design keeps the external connection point stable even when heavy external radiators are attached. Users who frequently cycle the connection should inspect the O-rings regularly for wear.

Highlights

  • Tool-free external radiator swaps via screw-on quick disconnects
  • Secure screw-cap locking prevents accidental disconnection under pressure
  • Permanent 18 mm bulkhead mount integrates cleanly into case panels
  • Dual G1/4″ internal threads route coolant internally without adapters
  • Compatible with Alphacool HF connector kits for expanded loop options

Specifications

TypeFittings

Questions about this item

How do I verify the bulkhead fitting is sealed correctly after mounting it in the 18 mm case openings?

After tightening the enclosed lock nuts, connect the internal G1/4" threads inside the case, fill the loop, and check the external HF quick-release faces for any moisture while the pump runs.

What comes in the box and which extra parts are needed to attach an external radiator?

The set includes the male and female bulkhead couplers with lock nuts; you must buy separate HF quick-release connector kits such as article 17396 to join external radiators or tubing.

Which version should I choose if I only have standard G1/4" ports inside my case?

This 17599 set is built for G1/4" internal threads, so it matches standard fittings directly; select it when your loop uses G1/4" connections throughout.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.