Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 599 284 found under Gage Set Micrometer by Sikorsky Aircraft Corporation. The National Stock Number assigned to this part is 5210008690473, and the Federal Supply Class is 5210 Measuring Tools Craftsmens. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 599 284.