Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number X-72328 PIECE 6 found under Holder Spring by Copesvulcan Inc. The National Stock Number assigned to this part is 5340012301572, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like X-72328 PIECE 6.