Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number JMC1999 found under Washer Lock by Johanson Manufacturing Corporation. The National Stock Number assigned to this part is 5310001966715, 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 JMC1999.