Kink.com spokesman Michael Stabile says many performers prefer not to use condoms and that the fine is part of a long-running campaign by those who oppose the porn industry.
The inspection was prompted by a formal complaint filed by AIDS Healthcare Foundation, a Los Angeles advocacy group, after two Kink performers - Cameron Bay and her then-boyfiend Rod Daily - tested HIV-positive last year.
Last September, California lawmakers voted down a bill that would have required that porn actors use condoms.
But CalOSHA rules already require companies to minimize employees' exposure to blood and other potentially infectious bodily fluids.