The latest order follows a previous contract awarded to the company by Lockheed in October 2015.
Under a long-term contract with BAE Systems since 2011, Avcorp has been manufacturing OBW assemblies.
Avcorp’s new product introduction (NPI) process will help carry out the work of paint preparation and installation of control surfaces and systems, such as the outboard leading edge flaps, ailerons, fairings and sub-systems.
Avcorp Group CEO Peter George said: "The resulting increases in efficiency and cost savings to the F-35 Programme are a testament to the types of synergy opportunities available to our customers.
"With the recent acquisition of key composite manufacturing capabilities through our new subsidiary, Avcorp Composite Fabrication (ACF), we are in discussions with Lockheed Martin to further expand our role on the F-35 Programme."
The NPI planning phase is nearing completion and production is expected to begin in the second quarter of this year.
Delivery of the first shipset to Lockheed’s final assembly and check out facility in Fort Worth, Texas, US, is on-schedule for the third quarter of this year, with subsequent confirmed orders extending out to 2018.
Developed by Lockheed Martin partnering with Northrop Grumman and BAE Systems, F-35 Lightning II is the 5th Generation fighter featuring a combination of stealth and agility, fully fused sensor information, network-enabled operations and advanced sustainment.
The F-35 variants are set to replace the F/A-18 for the US Navy, the F/A-18 and AV-8B Harrier for the US Marine Corps, and a variety of fighters for at least ten other countries.
Image: An F-35 Lightning II variant conducts a test flight. Photo: courtesy of Andy Wolfe.