MS24633B (NOTICE 1), MILITARY STANDARD: SCREW, TAPPING-THREAD CUTTING, TYPES BF AND BT, APPROXIMATE HOLE SIZES FOR (20 MAY 1988)
MS24633B (NOTICE 1), MILITARY STANDARD: SCREW, TAPPING-THREAD CUTTING, TYPES BF AND BT, APPROXIMATE HOLE SIZES FOR (20 MAY 1988).