CREATE TABLE table_204_828 (id DECIMAL, "whitworth size  ( in ) " DECIMAL, "core diameter  ( in ) " DECIMAL, "threads per inch" DECIMAL, "pitch  ( in ) " DECIMAL, "tapping drill size" TEXT)

does any whitworth size have the same core diameter as the number drill 26 ?
SELECT "whitworth size (in)" FROM table_204_828 WHERE "tapping drill size" = 'number drill 26 (3.7 mm)'
SELECT "whitworth size (in)" FROM "table_204_828" WHERE "tapping drill size" = 'number drill 26 (3.7 mm)'