If not a Hurlock, they are for stoves with a pump that unscrews from the tank, but they’re not identical to those of the military Nos. 2 or 3, which have a thicker valve barrel wall. They’d fit the 2 and 3 pumps nevertheless. I’ve suggested the ‘removable pump’ application because they lack this component … … though it fits them. Ironic that it’s usually the NRV ‘head’ that requires replacement, since it’s the part that gets damaged trying to remove a stuck NRV. Hurlock springs to mind therefore. John
, Very true John, a shame they did not contain the NRV heads as well, but never the less a great useful find John
