Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NP4011PCP382E23 found under Washer Recessed by Cooper Cameron Corp. The National Stock Number assigned to this part is 5310003646390, 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 NP4011PCP382E23.