Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 48SL-402AL found under Meter Fluid Flow Indicating Diff by Erdco Engineering Corporation. The National Stock Number assigned to this part is 6680010305291, 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 48SL-402AL.