Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 885966-1 found under Desiccant Container Dehumidifier by Obrien Gear Co. The National Stock Number assigned to this part is 4440003473973, 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 885966-1.