Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PD5277-45 found under Ball Bearing by Ultra Dynamics Ltd. The National Stock Number assigned to this part is 3110999571166, and the Federal Supply Class is 3110 Bearings Antifriction Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like PD5277-45.