Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 57027 found under Pin Toggle Eye Collar by Leroi International Inc. The National Stock Number assigned to this part is 5315013510733, and the Federal Supply Class is 5315 Nails Machine Keys And Pins. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 57027.