Boeing Co (BA.N) has been awarded a $640 million contract for spare parts used in F/A-18 aircraft, the Pentagon said on Monday.

The Defense Department added that Boeing had received two other orders to manufacture more spare parts for the F/A-18. The first was for $220.9 million and the second was for $123.2 million, it said in other announcements.

“The Boeing Company [of] St. Louis, Missouri, has been awarded a maximum $640.1 million… for spare parts used in F/A-18 aircraft,” the release, issued on Monday, stated.

Aircraft carriers are the main offensive force with the US Navy. On average, a US aircraft carrier can carry 30-40 F/A-18 Hornet jet fighters.