Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number UDB-623500 found under Pinshoulderheadless by United Drill Bushing Corporation. The National Stock Number assigned to this part is 5315016923881, and the Federal Supply Class is 5315 Nails Machine Keys And Pins. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like UDB-623500.