Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 74A690203-2017 found under Block Assembly Tube by Pcc Structurals Groton. The National Stock Number assigned to this part is 1560011544777, 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 74A690203-2017.