Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4 1-2 100FMH1-4LBM600RS080 found under Gage Pressure Dial Indicating by Bellofram Corporation. The National Stock Number assigned to this part is 6685000428467, 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 4 1-2 100FMH1-4LBM600RS080.