Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 553.A65 1 found under Sight Reflex by L 3 Communications Eotech Inc. The National Stock Number assigned to this part is 1240015330941, 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 553.A65 1.