Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1SF 2SF found under Switchboard Power by International Switchboard Corp. The National Stock Number assigned to this part is 6110012282366, and the Federal Supply Class is 6110 Electrical Control Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1SF 2SF.