Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 8056-57-1-1 found under Filler Cap Battery by Eagle Picher Technologies Llc. The National Stock Number assigned to this part is 6140001620890, and the Federal Supply Class is 6140 Batteries Rechargeable. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 8056-57-1-1.