Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4443 found under Grommet Nonmetallic by Hdt Expeditionary Systems Inc. The National Stock Number assigned to this part is 5325002755906, and the Federal Supply Class is 5325 Fastening Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4443.