Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2561584 found under Plug Leakproof Seal by Mk Test Systems. The National Stock Number assigned to this part is 5340015891277, 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 2561584.