Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number KL5SS8B found under Washer Lock by Kollsman Inc. The National Stock Number assigned to this part is 5310006372497, 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 KL5SS8B.