Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number U51AA16-6PF2RWX4 found under Gage Pressure Dial Indicating by Weksler Glass Thermometer Corp. The National Stock Number assigned to this part is 6685002494163, 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 U51AA16-6PF2RWX4.