Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 02161-5251 found under Tubing Assembly by Harsco Corporation. The National Stock Number assigned to this part is 4720009087721, and the Federal Supply Class is 4720 Hose And Flexible Tubing. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 02161-5251.