Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number KA20-5PCB found under Washer Key by Gpe Controls Inc. The National Stock Number assigned to this part is 5310005273255, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like KA20-5PCB.