Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PD7511-42 found under Bearing Washer Thru by Messier Dowty. The National Stock Number assigned to this part is 3120013420164, and the Federal Supply Class is 3120 Bearings Plain Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like PD7511-42.