Waltham- Mrs. Mary C. (Ranucci) Frigault of Waltham died Saturday May 29, 2004. She was 57. Born in Waltham a daughter of Margaret P. (Connearney) and the late Anthony J. Ranucci, Mrs. Frigault worked as a P.C.B. operator as well as a Group Leader for Raytheon Corporation for the past 26 years. She is survived by her daughter Delina A. Ranucci of Waltham, two granddaughters Felicia and Valerie, her brothers and sisters Joseph Ranucci of Athol, Patricia Aucoin of Marlboro, Jean Marie Butler of Waltham, Anthony Ranucci of Waltham, Lorraine Allain of Leominster, Margaret Pitterino of Acton, William Ranucci of Billerica, Charlene Cormier of Harvard, Karen Maines of Boxboro, Pamela Roche of Acton and Richard Ranucci of Waltham, her dear friend Cathy Berube of Waltham. Also survived by many nieces, nephews, aunts, uncles and cousins. The Funeral will be held on Thursday at 10 a.m. from The Joyce Funeral Home, 245 Main Street, ( Rte.20) Waltham followed by a Funeral Mass in Saint Charles Borromeo Church, 51 Hall Street Waltham at 11 a.m. Burial will be in Calvary Cemetery, Waltham. Visiting hours Wednesday 4-8 p.m. Memorial donations may be made to Nashoba Nursing and Hospice, 280 Ayer Road Harvard, Ma 01451