Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number H-0000-4744-8401 found under Brushbristle Steel by John Crane Inc. The National Stock Number assigned to this part is 7920016771097, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like H-0000-4744-8401.