Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MD1A820-23 found under Shock Mount by Hardigg Industries Inc. The National Stock Number assigned to this part is 8115000852797, and the Federal Supply Class is 8115 Boxes Cartons And Crates. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MD1A820-23.