Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 297-4365 PARTS KIT B2 found under Parts Kit Centrifug by Beckman Instruments Inc. The National Stock Number assigned to this part is 6545013190900, 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 297-4365 PARTS KIT B2.