Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number L20-00-00-26 found under Tester Spring Resiliency by Ametek Inc. The National Stock Number assigned to this part is 6635001827534, 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 L20-00-00-26.