Speyside Equity-backed Avon Machining, a manufacturer of large, complex, precision parts, agreed to acquire Plasma-Tec, a precision machining, grinding and wear and corrosion coating services provider. Financial terms were not disclosed. "As a reliable, cost-effective domestic source for high-quality precision parts, we look forward to expanding the strong relationships Plasma-Tec has built over the past 38 years with several leading OEMs," Chad Fietsam, CEO for Avon Machining.