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)

what is the core diameter of the last whitworth thread size ?
SELECT "core diameter (in)" FROM table_204_828 ORDER BY id DESC LIMIT 1
SELECT "core diameter (in)" FROM "table_204_828" ORDER BY "id" DESC NULLS LAST LIMIT 1