Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SM-757() APR-44(V found under Simulator Radar Sig by Joint Electronics Type Designation. The National Stock Number assigned to this part is 6940010618907, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SM-757() APR-44(V.