Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 122553 found under Nut Self Locking Hexagon by Paterson Limited T A Paterson. The National Stock Number assigned to this part is 5310015940824, 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 122553.