Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_1 (lead_pitch_mm INTEGER, part_number VARCHAR, body_length_mm VARCHAR)

### Question ###
Which Lead Pitch/mm has a Part Number of tsop40, and a Body Length/mm larger than 18.4?

### Accurate SQL ###

SELECT MAX(lead_pitch_mm) FROM table_name_1 WHERE part_number = "tsop40" AND body_length_mm > 18.4