Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 296-8420 PARTS KIT B1 found under Parts Kit Dental Engine Laboratory by Bell Industries Inc. The National Stock Number assigned to this part is 6545013028497, 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 296-8420 PARTS KIT B1.