Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TR81-4 found under Grommet Nonmetallic by Goodrich Corporation. The National Stock Number assigned to this part is 5325004980861, 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 TR81-4.