Lyn Nofziger, a former White House political director and a close associate of President Reagan, was indicted on six counts of violating federal ethics laws in lobbying the administration on behalf of Wedtech Corp., Fairchild Industries and a maritime union, according to court documents released yesterday.

In a written statement distributed by his lawyers, Nofziger said, "I am not a felon," and attacked the investigation conducted by independent counsel James C. McKay.

Nofziger, 63, a former reporter who has been associated with the president since 1965, when he served as press secretary in Reagan's first campaign for governor of California, said McKay "and his large staff of lawyers, FBI agents and IRS investigators have systematically ruined my good name, my business and my finances . . . . This action comes at the expense of justice and fair play . . . . I am innocent of any deliberate violation of the law, and if the independent counsel wants my scalp, he will have to get it the old-fashioned way."

Sources close to the McKay inquiry said yesterday that the investigation is continuing and that one area under scrutiny is the role Attorney General Edwin Meese III may have played in assisting Wedtech and Fairchild.

The indictment, which was returned Thursday by a federal grand jury, disclosed for the first time that Meese, while he served as White House counselor, received a letter from Nofziger in April 1982 on Wedtech's efforts to win a no-bid $32 million Army engine contract.

Meese, who has acknowledged that he interceded on Wedtech's behalf, has previously said that he acted in response to a series of memos from an old friend, San Francisco lawyer E. Bob Wallach, who later received more than $1 million in stock and cash from Wedtech.

Nofziger, who resigned as the White House political director on Jan. 22, 1982, was charged with violating a section of the 1978 Ethics in Government Act. Under the law, it is a violation for a federal official to lobby his former agency for one year after leaving the government on any "particular matter" in which the agency "has a direct and substantial interest." There is also a lifetime ban on lobbying any part of the government on an issue in which the former official had "personally and substantially" participated.

Mark Bragg, Nofziger's partner in a Washington lobbying firm, was also charged in the indictment with a single count of aiding and abetting Nofziger. His lawyer, Richard Ben-Veniste, said that Bragg, a former Los Angeles public relations consultant, will plead not guilty.

The indictment charges that during the year after he left the White House, Nofziger lobbied Meese, who was then White House counselor; James E. Jenkins, who was Meese's deputy and later went to work for Wedtech; former Army secretary John O. Marsh Jr., and former Small Business Administration chief James C. Sanders.

Nofziger's lawyers, Paul L. Perito and E. Lawrence Barcella, said that as a result of McKay's five-month investigation, a "For Sale" sign is now posted in front of the town house on 18th Street NW where Nofziger has his office. Perito added that Nofziger started losing contracts "when every client received a subpoena . . . . To survive under those conditions is virtually impossible. Mr. Nofziger has been severely crippled."

Perito said the Ethics Act is "ambiguous" and "constitutionally infirm." He added that McKay failed to provide any evidence that Nofziger's alleged violations were "knowing, intentional, or deliberate. An inadvertent violation is not a violation."

"This is not a corruption case. This is not a case of bribery, gratuity or graft. This is a case of lobbying in Washington allegedly in violation of the Ethics in Government Act. Lyn Nofziger is innocent. He is a victim . . . of a well-intentioned but ambiguous statute," Perito said.

Four of the charges deal with Nofziger's lobbying of Meese, Jenkins, Marsh and Sanders on behalf of Wedtech, the scandal-torn Bronx-based defense contractor that is now being reorganized under federal bankruptcy laws.

The indictment charged that before Nofziger left the White House, he personally "had been lobbied by representatives" of Wedtech and had "supported and promoted" White House efforts to assist the company. It said the White House supported giving the Army contract to Wedtech, a minority-owned company, because "the White House's political interests in the South Bronx would be served."

Wedtech was awarded the contract in August 1982.

A single charge deals with Nofziger's activities on behalf of Fairchild, which at the time was urging the Pentagon to continue purchases of its A10 antitank aircraft. According to the indictment, Fairchild hired Washington lawyer Stanton Anderson to lobby for the aircraft, and at Anderson's request, Nofziger on Sept. 24, 1982, contacted staff members of the National Security Council to promote continued federal funding for the A10.

Nofziger's lawyers said that if Nofziger was in technical violation of a law, it was because he relied on the legal advice he obtained from Anderson before leaving the White House on which lobbying activities he could properly conduct. "At all times he {Nofziger} acted fully in accordance with what he understood that advice to be," Perito said.

Anderson was out of town yesterday and unavailable to comment. His law partner, Stephen Nauheim, declined to comment. Sources said Anderson has cooperated with McKay and testified before the grand jury.

In the final charge, Nofziger was accused of lobbying the White House on behalf of the National Marine Engineers Beneficial Association. In 1982, the union was trying to convince the president and a Cabinet council to expand the use of civilian crews on Navy ships, which would create more jobs for its members.

In August 1982, Nofziger wrote to Jenkins, then deputy White House counselor, about the issue, the indictment said.

Perito said yesterday he will challenge the constitutionality of the Ethics in Government Act, either on the basis of its ambiguity or on the independent counsel provision. The constitutionality of the independent counsel portion of the act is already under attack by lawyers for former White House deputy chief of staff Michael K. Deaver and Marine Lt. Col. Oliver L. North, both targets of separate investigations by independent counsels.

If convicted, Nofziger could face up to 12 years in prison and fines of $60,000.

Nofziger is the first person to be charged directly with violating the Watergate-inspired ethics law and the second top Reagan aide to be indicted on charges stemming from the statute. Deaver faces five counts of perjury in connection with testimony he gave before a federal grand jury and a congressional subcommittee investigating whether he had violated the ethics law.