Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 87513-0501 ITEM 1 found under Yoke Bearing Stern by Electric Boat Corp. The National Stock Number assigned to this part is 2040010858677, and the Federal Supply Class is 2040 Marine Hardware And Hull Items. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 87513-0501 ITEM 1.