Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 122288-0009-2 ITEM 4 found under Gage Differential Dial Indicatin by Pmi Technologies Inc. The National Stock Number assigned to this part is 6685013842451, 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 122288-0009-2 ITEM 4.