Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 645-585-1421F found under Lampincandescent by Digi Key Corporation Dba Digi Key Electronics. The National Stock Number assigned to this part is 6240016758250, and the Federal Supply Class is 6240 Electric Lamps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 645-585-1421F.