I’ve collected some nouns which are always plural in English but are singular in Dutch.

de bril – glasses
de schaar – scissors
de broek – trousers
de spijkerbroek – jeans
het broekje – briefs, panties, knickers
het spijkerbroekje – 🙂

de buigtang – pliers
de politiek – politics
de pyjama – pyjamas
It’s probably a pure coincidence that they are ‘de’ nouns (except the diminutives of course).