To order the correct 3/8″-16 tpi .620″ length Time serts and bottoming tap:
Go to time-serts.com
Page down to search bar and type in 0381K to find the .620″ length inserts, then click “read more” and add the kit to cart.
Page down to the search bar and type 2-3-8-1-3-B to find the bottoming tap then click “read more” and add the bottoming tap to cart.