Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5999 found under Grommet Nonmetallic by Circor Aerospace Inc. The National Stock Number assigned to this part is 5325011012791, 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 5999.