Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number LFP-220-1137 found under Gage Pressure Dial Indicating by Span Instruments Inc. The National Stock Number assigned to this part is 6685006842671, 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 LFP-220-1137.