The workers, who complain they underwent "slave-like treatment" at a Mississippi shipyard, will also demand a Congressional investigation of their former employer Signal International.
Signal, a Northrop Grumman subcontractor that held them as bonded labourers and is already the subject of a criminal human trafficking investigation by the Department of Justice, a statement issued on behalf of them by the organisers said.
Allies from 'Jobs With Justice', a national campaign for workers' rights in United States, will join the workers, who arrived in Washington last week after a nine-day satyagraha, or "journey for justice" from New Orleans to Washington DC.
The group is among over 500 Indian welders and pipe-fitters trafficked to the US to work for Signal International after Hurricane Katrina. The workers have filed a major class action anti-racketeering suit against Signal and its US and Indian recruiters in federal court.
Last Thursday, the workers had staged a protest rally at Dupont Circle and then marched to the Indian Embassy on Massachussetts Avenue where they had a three-hour-meeting with the Indian Ambassador Ronen Sen. They had also demanded a CBI probe into their case.
Sen gave the workers and their representatives a patient hearing at the embassy in which he promised to take up their grievances but only though appropriate and established channels.