Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AB2534E4 found under Bolt Assembled Washer by Pattonair Usa Inc. The National Stock Number assigned to this part is 5306010567973, and the Federal Supply Class is 5306 Bolts. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AB2534E4.