Do units of metric measurement get period after abbreviation

Norbert and suzie are both lineworkers for a utility company who have been working together for almost two years. norbert frequently tells suzie that the job is called "lineman" and not "linewoman," and thus, it is not a woman's job. he plays practical jokes on her such as hiding some of her tools and sabotaging her truck. he asks her when she plans on getting pregnant and staying at home to take care of her children and gives her copies of " wanted" ads for secretarial and waitress jobs. such behavior has kept suzie disturbed at work. if suzie complains about norbert's conduct: