Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 55-21024 found under Tip Assembly Horizo by Hi Shear Corporation. The National Stock Number assigned to this part is 1560001859205, 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 55-21024.