Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A1733ITEM9 found under Plastic Sump Strainer by Kraissl Co Inc The. The National Stock Number assigned to this part is 4620001193863, and the Federal Supply Class is 4620 Water Distillation Equipment Marine And Industrial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A1733ITEM9.