Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3591 4CNPX0 375IN found under Insert Screw Thread by Armstrong Precision Components Ltd. The National Stock Number assigned to this part is 5325999141997, and the Federal Supply Class is 5325 Fastening Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3591 4CNPX0 375IN.