The disclosure relates to a connector assembly including a male connector and a female connector that are connectable to each other. The male connector includes a connector main body having an annular shape and a plurality of male nubs arranged circumferentially around the connector main body, each male nub configured to be received by a corresponding female slot. The female connector includes a main body portion having an annular shape and a plurality of female slots arranged circumferentially around the main body portion, each female slot configured to receive a corresponding male nub. The male connector and female connector are configured such that when the male connector is connected to the female connector, the plurality of male nubs engages with respective ones of the plurality of female slots. The connector system is particularly applied to link building components together to form structural elements.