In Timken Roller Bearing Co. v. NLRB, 325 F.2d 746 (6th Cir. 1963), cert. denied, 376 U.S. 971, 84 S.Ct. 1135, 12 L.Ed.2d 85 (1964), the court considered a union request for information concerning five grievances that awaited hearings before a chosen arbitrator.
In Puerto Rico Tel. Co. v. NLRB, 359 F.2d 983, 987 (1st Cir. 1966), and W. Mass. Elec. Co. v. NLRB, 573 F.2d 101, 106 (1st Cir. 1978), we held that subcontracting is not a mandatory subject of collective bargaining unless the subcontracting results in the displacement of union workers.