NLRB v. Washington Aluminium Co., 370 U.S. 9 (1962), was a US labor law related Supreme Court ruling concerning the right of workers to engage in protected concerted activity.

Section 7 of the National Labor Relations Act gives employees the right to "engage in other concerted activities for the purpose of collective bargaining or other mutual aid or protection."

The Supreme Court ruled that a walk-out was protected activity even if workers did not present "a specific demand upon their employer to remedy a condition they found objectionable.

The National Labor Relations Board ruled that the employee walk out was a protected form of protest under the National Labor Relations Act's section 7, which protects the rights of workers regardless of whether they are in a union to engage in group activity to improve their working conditions, ordering the company to reinstate the workers.

The Fourth Circuit Court of Appeals ruled that the walk out was not protected because, although the employees left because of the cold, they did not make a specific demand to their employer.