Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 16W143-7 found under Spar Aircraft by Progressive Incorporated. The National Stock Number assigned to this part is 1560015013172, 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 16W143-7.