Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WSF12F4CBB6DC found under Nut Self Locking Clinch by Asi Aerospace Group Inc. The National Stock Number assigned to this part is 5310013892591, 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 WSF12F4CBB6DC.