Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 204-001-289-3-17128 found under Guide Tube by Pyramid Machine Corp. The National Stock Number assigned to this part is 1560007782217, and the Federal Supply Class is 1560 Airframe Structural Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 204-001-289-3-17128.