Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HN5GK1999 found under Fastener Spring Tension Trim by Hartwell Corporation. The National Stock Number assigned to this part is 5325010886924, 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 HN5GK1999.