Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MAG5664-187 found under Adapter Assembly Fl by Speco Corp. The National Stock Number assigned to this part is 1560000154805, 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 MAG5664-187.