Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 53 028 125 0312 found under Pin Spring by Harvard Industries Inc. The National Stock Number assigned to this part is 5315010771163, 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 53 028 125 0312.