Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R89158X05020 found under Stud 0 625 11 X by Dresser Rand Co. The National Stock Number assigned to this part is 5307015888997, and the Federal Supply Class is 5307 Studs. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like R89158X05020.