Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A51B96503-401 found under Fitting Structural Component Air by Kaman Aerospace Corporation. The National Stock Number assigned to this part is 1560013389598, 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 A51B96503-401.