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Low pressure no-spill quick disconnect couplings which push to connect with a negligible amount of coolant freed. The QD4 series includes couplings for 13mm (1/2 inch) ID hose.

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QD4 Female Quick Disconnect No-Spill Coupling, Male Threaded G 3/8 BSPP
Koolance patented quick disconnect no-spill coupling with automatic shutoff. G 3/8 BSPP (parallel) thread female fitting for screwing directly into a water block or other component of same threading. It will only fit a Koolance QD4 male quick disc ...
$14.99
QD4 Male Quick Disconnect No-Spill Coupling, Male Threaded, 3/8 NPT
Koolance patented quick disconnect no-spill coupling with automatic shutoff. 3/8 NPT (tapered) thread male fitting for screwing directly into a component of the same threading. It will only fit a Koolance QD4 female quick disconnect. After pu ...
$12.49
QD4 Female Quick Disconnect No-Spill Coupling, Male Threaded, 3/8 NPT
Koolance patented quick disconnect no-spill coupling with automatic shutoff. 3/8 NPT (tapered) thread female fitting for screwing directly into a component of the same threading. It will only fit a Koolance QD4 male quick disconnect. After pu ...
$14.99
QD4 Male Quick Disconnect No-Spill Coupling, Male Threaded G 3/8 BSPP
Koolance patented quick disconnect no-spill coupling with automatic shutoff. G 3/8 BSPP (parallel) thread male fitting for screwing directly into a water block or other component of same threading. It will only fit a Koolance QD4 female quick disc ...
$12.49