Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 502581 found under Pin Grooved Headless by Optex Systems Inc. The National Stock Number assigned to this part is 5315000107317, 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 502581.