Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PB 15472 4 found under Screw Instrument by Carleton Technologies Inc. The National Stock Number assigned to this part is 5305004876407, and the Federal Supply Class is 5305 Screws. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like PB 15472 4.