Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 7M502A4 found under Cooler Fluid Industrial by Kewanee Boiler Corp. The National Stock Number assigned to this part is 4420002690819, 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 7M502A4.