Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number K39253-4-5 found under Nut Self Locking Ro by Satair A S. The National Stock Number assigned to this part is 5310008328289, 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 K39253-4-5.