Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C4161 found under Gage Set Carburetor by Apex Tool Group Llc. The National Stock Number assigned to this part is 5210011128306, and the Federal Supply Class is 5210 Measuring Tools Craftsmens. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like C4161.