William J. Brennan, Jr.

“ Peter Cailler Kohler Swiss Chocolates Co., 2 Cir., 130 F.2d 503, 505-506:
'When all the other workmen in a shop make common cause with a fellow workman over his separate grievance, and go out on strike in his support, they engage in a 'concerted activity' for 'mutual aid or protection,' although the aggrieved workman is the only one of them who has any immediate stake in the outcome. The rest know that by their action each one of them assures himself, in case his turn ever comes, of the support of the one whom they are all then helping ”

“ The Court of Appeals reversed on the ground that Local 113 'had no economic interest in Local 22's claim of breach of contract,' and that therefore 'it was coercing Armstrong not for its own benefit but for the benefit of another local at the expense of a neutral employer.' 357 F.2d, at 189. We disagree.
National Woodwork Mfrs., supra, holds that collective activity by employees of the primary employer, the object of which is to affect the labor policies of that primary employer, and not engaged in for its effect elsewhere, is protected primary activity. ”

“ Armstrong purchased from Thorpe Company, a manufacturer of insulation materials, asbestos fittings upon which the cutting and mitering work had already been performed. Agents of Local 113 informed Armstrong that fittings would not be installed unless the cutting and mitering had been performed by its sister Local 22 as provided by Local 22's bargaining agreement. [2] The Board found, as it had in No. 206, that the object of this refusal was primary the preservation of work customarily performed by Armstrong's own employees. ”