People are generally bemused at my consistent use of stock tube connectors for the building of large multicopter airframes, but this is an example on a new Airbus of their readiness and suitability on certified components... in this case the passenger seating.
Passenger seating itself is largely overlooked by the travelling public, but there's a lot that goes into it. Each seat has to be light yet comfortable, and particularly resistant to breaking loose in the event of a severe deceleration. Or crash, to you and me. That's why there's a dog-leg in that rear support.
Alloy tubing and plastic connectors feature in the restraint beneath all three seats in a row, and has therefore to withstand the weight of all three passengers resting their heels upon it. The part used once to require casting or bending with the aid of skilled labour and bespoke machinery, and now (like my drones) it doesn't... yet still works.
And though literally beneath consideration, the part is integral to the carrier's policy toward carry-ons: free for bags under the seat, fee for larger in the overhead stowage.
