Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2-543-08-03 found under Thread Unwinder Sgl by Chandler Industries Inc. The National Stock Number assigned to this part is 3530012140145, 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 2-543-08-03.