Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R13-168 found under Stud Wheel by Hayes Wheels Intl Inc. The National Stock Number assigned to this part is 5307008718847, 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 R13-168.