Panavia Tornado spring-loaded flush-mount access panel latch

This part is from a Panavia Tornado.
The markings provide several clues:
• The Part Number: 210 99-22-040 is a specific airframe component code. The middle segment (99) is the NATO country code for Germany, which was one of the primary partners in the Panavia consortium (alongside the UK and Italy) that produced the Tornado.
• The "STOI" Prefix: This refers to the specific engineering or sub-assembly designation used within the Panavia production line for access panel hardware.
• The Stampings: The "SE HB" and small proof marks are characteristic of European military aerospace quality control stamps (specifically German/MBB or British/BAE inspection marks) found on Tornado components.
What is it?
This is a spring-loaded flush-mount access panel latch. These are used extensively across the Tornado’s fuselage to secure panels for:
• Engine access (cowling panels)
• Avionic bays (along the sides of the nose)
• Refueling points The white paint suggests it likely came from a Tornado in a display/commemorative livery or a specific high-visibility scheme (like the RAF "Raspberry Ripple" test aircraft or certain Saudi Arabian variants), as most operational Tornadoes were painted in tactical grey or camouflage. It is a common "collector's item" for aviation enthusiasts because these latches are robust and satisfyingly mechanical.