Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 99591 found under Shaft And Insert Assembly by Triumph Engine Control Systems Llc. The National Stock Number assigned to this part is 2915004159828, and the Federal Supply Class is 2915 Engine Fuel System Components Aircraft And Missile Prime Movers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 99591.