Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 120S257EAA058B found under Switch Aircraft Mat by Bell Helicopter Textron Inc. The National Stock Number assigned to this part is 1680015241611, and the Federal Supply Class is 1680 Miscellaneous Aircraft Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 120S257EAA058B.