Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 90-6815-55154 found under Pin Tapered Threaded by Cincinnati Gear Co The. The National Stock Number assigned to this part is 5315012815620, and the Federal Supply Class is 5315 Nails Machine Keys And Pins. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 90-6815-55154.