Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number IPD4B5441 found under Cap Filler Opening by Industrial Parts Depot Inc. The National Stock Number assigned to this part is 2590003561863, and the Federal Supply Class is 2590 Miscellaneous Vehicular Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like IPD4B5441.