Prion Manufacturing Company has been family-owned since its founding in 1955 and produces high-volume machined components, including automatic screw machine products. After beginning with tools, dies, fixtures, and general machine-shop work, it expanded into screw machining and later added CNC equipment; its current facility was designed for precision-machined production and built in 1997.
ISO 9001:2015
Richland Screw Machine Products, IncFounded by Charles J. Schoenman in a Mansfield double garage in 1946, Richland Screw Machine Products makes precision screw-machine parts and continues to operate as a hands-on family business under his grandson, Randall L. Schoenman. The company combines its Brown & Sharpe single-spindle equipment with newer CNC machining to produce customer-specified parts, and has held ISO certification since 2017.MANSFIELD, OH
Proficient Machining CoEstablished in 1973, family-owned Proficient Machining Co. makes precision CNC-machined and screw-machine parts for customers across industries including aerospace, medical, nuclear, and automotive. The Mentor, Ohio manufacturer combines a long-tenured workforce—with many employees staying 20 to 30 years—with capabilities ranging from one-piece prototypes to high-volume production. Its quality system is ISO 9001:2015 certified.MENTOR, OH
Pronto ManufacturingPronto Manufacturing is a three-generation family-owned business founded in 1980 by tool-and-die maker Frank Silvestri. The Long Island company now works from a 10,000-square-foot facility, carrying its founder’s precision-minded approach into CNC machining and custom tooling for customers needing prototype or production work.RONKONKOMA, NY