Using data from 179 undergraduate men from 38 higher education institutions, we examined if adherence to masculine norms and social dominance hazing endorsement changed over three years of membership in a historically white college social fraternity. In addition, we examined if changes in conformity to specific masculine norms affected their social dominance hazing endorsement. We found no significant differences in social dominance hazing endorsement or conformity to seven masculine norms from 2017 to 2020, though conformity to power over women and heterosexual presentation were statistically significantly lower in 2020 than 2017. Increased conformity to power over women and risk-taking was associated with social dominance hazing endorsement. Findings indicate that membership in a historically white college social fraternity have limited effects on men's conformity to masculine norms and social dominance hazing motivations. We identified implications for fraternity recruitment practices and interventions, and encourage collaboration with middle and high school stakeholders to address the precollege gender socialization of adolescent boys.