Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NA342PT2LBB9 OPTION BK found under Gage Pressure Dial Indicating by Weksler Glass Thermometer Corp. The National Stock Number assigned to this part is 6685002727658, 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 NA342PT2LBB9 OPTION BK.