Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E3 56 15 found under Fastener Snapslide by Southco Inc. The National Stock Number assigned to this part is 5325015160136, and the Federal Supply Class is 5325 Fastening Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like E3 56 15.