#117924 set of 5 concave block freeze plugs for all 1933, 1934, 1935, 1936, 1937, 1938, 1939, 1940, 1941, 1942, 1946, 1947, 1948, 1949, 1950, 1951, 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968 Plymouth, Dodge, Truck, DeSoto, and Chrysler vehicles with the indestructable flathead 6 cylinder engine. Most blocks use 5 of these.