pop rivet
Concise Oxford English Dictionary © 2008 Oxford University Press:
pop rivet
▶noun a tubular rivet that is inserted into a hole and clinched by the withdrawing of a central rod. ▶verb (pop-rivet) (pop-rivets, pop-riveting, pop-riveted) secure or fasten with pop rivets.
'pop rivet' also found in these Oxford entries:

