Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B831-9511-75 found under Clinch Plate Snap Fastener by Electric Boat Corp. The National Stock Number assigned to this part is 5325015031744, 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 B831-9511-75.