Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 24502-22B21 found under Gage Pressure Dial Indicating by 3D Instruments Llc. The National Stock Number assigned to this part is 6685016024630, 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 24502-22B21.