Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 6-4DIN433STA3P found under Washer Flat by Din Deutsches Institut Fuer Norm. The National Stock Number assigned to this part is 5310121637545, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 6-4DIN433STA3P.