Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 6L.3361.005.00-743987 found under O Ring by Selex Communications Inc. The National Stock Number assigned to this part is 5331002427402, 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 6L.3361.005.00-743987.