Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1491A found under Terminal Stud by U S Engineering Co. The National Stock Number assigned to this part is 5940006834635, and the Federal Supply Class is 5940 Lugs Terminals And Terminal Strips. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1491A.