Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2HH18ELCCKMY found under Cylinder Assembly by Thermo Orion Inc. The National Stock Number assigned to this part is 1720012424058, 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 2HH18ELCCKMY.