Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 412-728-221 found under Saddle Skid Tube Assembly Aircra by Aeronautical Accessories Inc. The National Stock Number assigned to this part is 1620015294330, and the Federal Supply Class is 1620 Aircraft Landing Gear Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 412-728-221.