Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number US7-03C012-550 found under Ringwearing by Carver Supply Inc. The National Stock Number assigned to this part is 2935016837523, and the Federal Supply Class is 2935 Engine System Cooling Components Aircraft Prime Moving. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like US7-03C012-550.