Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number L1643C516 found under Shim by Skyline Industries Llc. The National Stock Number assigned to this part is 5365000824211, and the Federal Supply Class is 5365 Bushings Rings Shims And Spacers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like L1643C516.