Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 491CDPL found under Eyelet Metallic by Arco Metals Co. The National Stock Number assigned to this part is 5325006394426, 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 491CDPL.