David Brooks has asked a federal judge to lift what he says are the onerous conditions he is being held under at the Nassau County jail in East Meadow, according to several sources.

In a legal brief filed Monday, the former body-armor magnate said he is being kept in solitary confinement, is not allowed contact with other prisoners, and is only permitted out of his cell when he is in arm and leg shackles, according to the sources.

Additionally, Brooks complained that his lawyers have only been allowed to speak to him through a glass partition and that three members of his defense team have not been permitted to visit him.

Brooks, whose case is before jurors in federal court in Central Islip, was transferred to the jail last week, for security reasons, from a detention center in Queens at the request of federal marshals.

The marshals have alleged on two occasions that Brooks had illegal possession of tranquilizers and had received written material that did not involve his $185-million fraud case but may have indicated the jury deliberating the charges against him had been tampered with.

Brooks' brother Jeffrey and two paralegals -- Jil Klinkert, who is also his girlfriend, and Aaron Hendel -- have been barred from visiting him. They had to give FBI agents fingerprints and handwriting samples as part of the federal investigation into whether Brooks was involved in jury tampering.

Brooks' lead attorney, Kenneth Ravenell, declined to comment Monday, as did Robert Nardoza, a spokesman for the U.S. Attorney for the Eastern District.

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Jail officials could not be reached for comment Monday.