SEATTLE — Boeing employees are still without a new union contract as the workers strike stretches into its third week. The machinists’ union negotiation team and Boeing representatives were in federal mediation Friday, but so far no new contract has been put forth to union members for a vote.

Two weeks after Boeing Co. tried and failed to end a strike with the brash move of a direct offer to workers, the planemaker and its largest union are taking another stab at a more conventional pattern of consultation and shuttle diplomacy to end the stalemate.

Boeing and IAM union leaders are set to resume negotiations on Monday, three weeks after 33,000 workers went on strike.