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 top amount of threads per inch ?
SELECT MAX("threads per inch") FROM table_204_828
SELECT MAX("threads per inch") FROM "table_204_828"