Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 6155CME ITEM NUMBER 4 found under O Ring by Soc Alsacien Reglage Thermique. The National Stock Number assigned to this part is 5331143261107, 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 6155CME ITEM NUMBER 4.