Wiktionary
filler caps
n. (plural of filler cap English)
Usage examples of "filler caps".
Fully loaded at 68 tons, Dennings' Demons, her tanks filled to their filler caps with over 7,000 gallons of fuel, her forward bomb bay holding a six-ton bomb, and carrying a crew of twelve, began to roll.
There was no conversation, no banging of bronze nozzles against aluminum filler caps, only the throbbing of the tank truck's pumps.
Love probed beneath the cylinder block and behind the clutch housing and would have unscrewed both the radiator and oil filler caps had not Purbright dissuaded him.