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Keystone Abrasives is a U.S. manufacturer of coated abrasive products, custom-making sanding belts, discs, rolls and pump sleeves with specialized equipment. Unlike a conventional sandpaper supplier, the company manufactures to customer requirements while also supplying specialty abrasives from other manufacturers. Its custom sanding discs can range from 1/2 inch to 42 inches in diameter, and its abrasive rolls can be made up to 54 inches wide.
Since 1993, Matamoras-based Keystone Arms has dealt in firearms while also making and supplying hard-to-find parts for historic guns. Its shop is particularly distinctive for its deep Reising submachine-gun and Thompson parts offerings, including Keystone-made Reising magazines and reproduction components. The business serves customers through its retail store and online shop, with firearms also offered through auctions and Davidson’s.
Keystone Capsules makes stock and custom tin capsules for the wine industry at its 35,000-square-foot facility in Coatesville, Pennsylvania. A division of Nathan Trotter & Co., the company draws on its parent organization’s 230 years of American tin-manufacturing experience while producing capsules domestically for quicker turnaround. Its dedicated recycling division recovers and refines used tin, supporting a capsule program designed around full recyclability.
Founded in Scranton in 1926 by Joseph Galdieri, Keystone Concrete Block and Supply Company manufactures concrete building blocks and Versa-Lok retaining wall systems while supplying masonry and hardscape materials across the region. The third generation of the founding family now operates the company from three Pennsylvania manufacturing locations, serving customers in Pennsylvania, New Jersey, Connecticut and New York. Keystone is the exclusive manufacturer of Versa-Lok retaining wall systems for eastern Pennsylvania.
Founded in 1976 by Bill and Lois Krueger, Keystone Crane and Hoist is a family-owned Canonsburg manufacturer and service company that designs, builds, installs, and maintains overhead cranes and hoists. Its 18,000-square-foot facility on 10 acres was built for producing large-scale cranes up to 125 feet, with the company now operated by the Krueger family’s next generation. Keystone serves the Tri-State area with American-made crane systems and specialized lifting solutions, including explosion-proof and spark-resistant equipment.
With more than 30 years in the trade, Keystone Custom Fabricators is a Pittsburgh-area manufacturer known for custom sheet-metal work serving food-service and institutional projects. From its 30,000-square-foot facility, the company produces made-to-specification equipment for settings ranging from schools to hospitals, with NSF and UL approval supporting its work.
Formed in 1996, Keystone Displays is a Harrisburg-area visual marketing company built around trade show exhibits, signage and creative services. Its in-house team brings projects from design and large-format printing through production, giving clients one local source for trade show and marketing work. Trade show exhibits remain the company’s core specialty, alongside branded environments and custom visual solutions.
With more than a century of drilling experience, Keystone Drill Services is known as a practical, long-term resource for drillers across industries. Its team works from Pennsylvania and Ohio to develop custom solutions and support equipment in the field, serving customers from initial needs through ongoing maintenance. Keystone was acquired by Preferred Pump & Equipment in 2025, while continuing its established mission of supporting drilling operations.
Keystone Electronics Corp. manufactures electronic components and hardware, including battery and fuse connectivity products, contacts, connectors, terminals, spacers, standoffs, brackets, panel hardware, and related accessories. The company also offers custom capabilities and serves telecommunications, computing, industrial, electronic, automotive, security, medical-monitoring, and other device applications.
Since Beverly L. Vogt co-founded Keystone Fabricating in 1982, her 100% woman-owned company has grown from its New Jersey beginnings into a Bethlehem manufacturer rooted in the region’s steelmaking heritage. Today, Keystone produces custom sheet-metal parts and assemblies for manufacturers that need anything from a prototype to a sustained production run, with particular experience in pharmaceutical and process equipment.
Rooted in Elizabethtown, Pennsylvania, Keystone Farmers produces frozen fruits, vegetables and specialty foods for retailers, distributors and food-service operators. The family-owned brand is part of Turn 4 Foods, established in 2013 by a management team with more than 60 years of experience, and operates a local facility with 80 million pounds of storage capacity. Its SQF- and OU Kosher-certified operation serves more than 4,000 stores through 46 distribution centers across the continental United States.
For more than 37 years, Keystone Fastening Technologies has built stud-welding systems and specialty fasteners from its Wexford, Pennsylvania operation, serving customers worldwide. The company is the proud North American partner and exclusive distributor of OBO Bettermann stud-welding products, while its prototyping lab develops custom solutions through cold heading, turned-part and CNC capabilities. Keystone also supports its equipment in-house with repair, rebuild, loaner and rental services.
Keystone Foam fabricates custom foam products at its Derry, Pennsylvania facility, serving manufacturers and other customers with engineered foam components. Founded in 1983, the Western Pennsylvania company has more than four decades of experience in foam fabrication and emphasizes collaborative customer relationships through its “Handshakes Matter” philosophy.
Founded in 1893, Keystone Forging Company is a Pennsylvania manufacturer of closed-die forgings, continuing a local blacksmithing tradition that predates its founding. It produces custom forged parts and provides in-house tooling design and secondary operations, serving customers across a broad range of industries.
Founded in 1905 as a maker of friction hinges and furniture hardware, Keystone Friction Hinge Co. is a privately held Pennsylvania manufacturer with an 88,000-square-foot facility in South Williamsport. It now specializes in contract metal stamping, CNC machining, and assembly, and has supplied industrial customers for decades. The company describes its work as progressing from concept and prototyping through full production.
Founded in 2007, Keystone Healthcare Innovations is a family-owned small business in Pennsylvania’s Lehigh Valley, known for developing practical healthcare solutions for people who rely on home oxygen. Its patented nasal cannula protective cover reflects the company’s focus on supporting patients and care providers with simple, reusable products.
Keystone Instant Printing is a full-service printing company operating since 1974, offering offset printing, digital printing, promotional products, wedding invitations, and design services. They serve both business and individual clients from their facility in Wyomissing, Pennsylvania.
Family-owned and operated since 1987, Keystone Machinery Corporation of Lancaster County, Pennsylvania, builds stake pointers and sawmill equipment. Its 10-person team is known for hands-on machine support, including troubleshooting and reconfiguring equipment until problems are solved.
Founded in 1894 in a small factory, Keystone Manufacturing has grown into a 90,000-square-foot Southwestern Pennsylvania manufacturer known for its long-running focus on flat-wire conveyor belting. Its experienced operators average 20 years with the company, serving more than 5,000 customers worldwide from in-house steel production and a substantial keyed-shafting operation.
Keystone Metals is a Pittsburgh metalworking and fabrication company that emerged in 1989. It makes custom metalwork for buildings, including specialty staircases and railings, and says its work can be found throughout the Tri-State region and beyond. The company describes its history as built on generations of expertise and experience.