Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 309-6647 PARTS KIT B1 found under Parts Kit Electrosu by Tyco Healthcare Group Lp. The National Stock Number assigned to this part is 6545013201161, 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 309-6647 PARTS KIT B1.