Pen Manufacturing, established in 1984, is a California-based metal fabrication and precision manufacturing partner serving OEMs across aerospace, defense, energy, and industrial sectors. Operating under AS9100D certification, the company delivers welding, sheet metal fabrication, machining, and full assembly services with a focus on consistency and lead time reliability. Pen Manufacturing combines deep shop-floor expertise with engineering insight to support projects from prototyping through full-scale production. With advanced in-house capabilities and a solutions-driven approach, the team addresses real manufacturing challenges such as RFQ accuracy, quality control, and supply chain stability. Connect with Pen Manufacturing to discuss your next project.