Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HC1-252-12-23 found under Heating Element Electrical Nonim by Hatco Corp. The National Stock Number assigned to this part is 4520001630342, 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 HC1-252-12-23.