Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AS4004 found under Cotter Pin Assortme by Kelsey Hayes Company Inc. The National Stock Number assigned to this part is 5315015205676, 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 AS4004.