Federal supply schedule, FSC group. 56. Construction and building materials, pt. 1 (formerly class 59), FSC class 5610, Mineral construction materials, bulk, 5620, Building glass, tile, brick and block, 5640, Wallboard, building paper and thermal insulation materials, 5650, Roofing and siding materials, GSA region 3, District of Columbia, and Maryland, Virginia, and West Virginia, Aug. 15, 1958-Feb. 14, 1959; prepared by GSA region 3.

Tools