Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HR20105 found under Valve E Haust by Ecolaire Heat Transfer Co. The National Stock Number assigned to this part is 2815003935486, and the Federal Supply Class is 2815 Diesel Engines And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HR20105.