Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SB 48-54 found under Fastener Mounting Bracket by First Filtration Pty Ltd. The National Stock Number assigned to this part is 5340015776190, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SB 48-54.