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PA
Founded in Pittsburgh in 1939, Diamond Wire Spring Company designs and manufactures industrial custom and stock springs and wire forms. Still independent and third-generation family-owned, the American manufacturer serves customers from three ISO 9001:2015-certified plants and a stock warehouse, with thousands of springs available for same-day shipment. Its long history includes specialized work for demanding fields such as rail transportation and medical equipment.
DiamondBack Truck Covers began as a Penn State engineering-class project in 2003, then grew from its founders’ garage into an American manufacturer rooted in Philipsburg, Pennsylvania. The company is known for making its truck-bed covers in the USA while investing in local mentorship, volunteer work, and a shortened paid workweek that gives employees more time with their families.
Since 1990, Diamonex has developed diamond-like carbon and polycrystalline diamond coating technologies for components operating in demanding environments. The Allentown company combines its own ion-source and deposition processes with application engineering to tailor thin, conformal coatings, including its patented DIAMONDSHIELD® treatment for plastics and engineered Phoenix® CMP pad conditioners for semiconductor wafer fabrication. Its R&D team has generated more than 46 patents.
Diaz Manufacturing makes custom solid-wood cabinet components in the United States, drawing on a trade-focused operation built around controlled supply, manufacturing, and shipping chains. Its products are made to order, with the company highlighting in-house hardwood processing and a standard two-week lead time.
Since 1990, Dice’s Creative Cakes has baked and decorated custom wedding and celebration cakes in Boyertown, along with fresh pastries and dessert trays. Founder and owner Mary Dice formulates the bakery’s recipes, including its moist fine-grain pound cake and house-made whipped buttercream, while the in-house selection has grown to more than 40 wedding cake and filling flavors. The bakery also accepts advance orders for specific allergen-free items, including gluten-free cakes.
Founded by Tom Maxwell in 1974, Die Quip Corporation began as an equipment builder to make die finishing faster and easier for in-house die shops. The family business is now run by his sons, Tom and Scott Maxwell, and designs and builds equipment for working tungsten-carbide drawing dies, with a stated focus on rigid machine platforms and repeatable heavy cutting. Its products serve the wire, bar, and tube drawing industries.
Die Sets, Inc. manufactures standard and custom die sets, including steel and aluminum die-shoe versions. Its facility uses CNC flame-cutting equipment, rotary grinders, and CNC machining centers to produce sets to customer drawings or CAD files, with machining operations available as part of the work.
DIE-TECH is a Pennsylvania metal stamping manufacturer established in 1974, specializing in precision stamped components and metal microstamping. The company is a second-generation, family-owned business and describes itself as privately held; it works with customers from engineering and prototyping through production. Its stamped parts serve industries including medical devices, automotive, telecommunications, nuclear, military, and aerospace.
Founded in 1982, Die-Tech Mfg., Inc. is a Western Pennsylvania manufacturer of precision tooling and die components, including carbide and steel stamping dies. Its 125,000-square-foot facility combines machine-shop and heat-treating operations with EDM and precision grinding capabilities, and the company highlights its work for lead-frame and electronics applications.
What began with Mark Dieffenbach frying potato chips on his kitchen stove in Berks County in 1964 has grown into a Pennsylvania snack maker producing kettle-cooked chips and other snacks. Still guided by the Dieffenbach family’s recipe across three generations, the company operates a 106,000-square-foot facility capable of processing more than 15 million pounds of potatoes annually. Its Uglies® brand gives cosmetically imperfect potatoes a second life while supporting hunger relief, with 10% of proceeds donated to VivaKids.
From a farmhouse basement in Glen Rock, Pennsylvania, Diesel Pro has grown into a family-owned diesel parts remanufacturer, distributor, and repair operation serving customers across the United States and Canada. Founded by Lance Donaldson in 1985 and now managed by his son Scott, the company remanufactures fuel-system components and turbochargers while running a full-service truck repair facility with 11 bays. Its 30,000-square-foot warehouse holds more than 100,000 parts, giving the long-standing local business an unusually broad reach.
Since 1939, four generations of the Dietz family have made deli meats and cheeses in Philadelphia, beginning with Gottlieb Dietz’s original German bratwurst recipe. The family-owned company still hand-spices its meats and slow-roasts them without artificial flavors, fillers, colors or MSG, carrying old-fashioned care into a broad range of deli foods and snacks.
Founded in 1990 by scientist Dr. Tibor Sipos, Bethlehem-based Digestive Care, Inc. develops and manufactures pharmaceutical treatments for gastrointestinal disorders, including the PERTZYE pancreatic enzyme replacement therapy. The company’s work grew from Sipos’s patented microencapsulation technology for protecting digestive enzymes during gastric transit, and PERTZYE is manufactured in the USA by DCI.
Digger Specialties, Inc. manufactures outdoor living and building products, including aluminum and vinyl railing, fencing, gates, architectural columns, screen enclosure systems, and deck lighting. Its capabilities include aluminum fabrication and a proprietary 10-step powder coating process, with products serving residential and commercial outdoor living applications.
Founded by Doug Creed in South Carolina in 2005, Digital Designed Solutions is a family business that became a two-generation operation when his son Adam joined in 2017. Now based in the Philadelphia area, the company is known for keeping its custom whiteboard production in-house, from design through framing and packaging, serving organizations that need durable visual communication tailored to their own work.
Digital Designs Dental Lab is a nationwide, full-service dental laboratory producing restorative appliances for dentists, with regional facilities that support practices across the country. Its distinguishing focus is a hands-on doctor experience: the team records each clinician’s preferences, communicates during production, and provides a portal for real-time case tracking and ongoing lab communication. The lab reports an average in-lab turnaround of 10 business days and offers new dentists a welcome kit that includes a first crown.
Founded in 1999 by former C.C. Sutinen manager Willard Ettinger, Digital Press USA designs and manufactures hydraulic powder compacting presses for dry-molded parts. The family-owned Bethlehem company builds machines to stock, subjects them to a 300-point inspection, and supports them with no-charge remote diagnostics rather than treating service as a profit center. It also rebuilds Bussmann, Mannesmann, and Alpha presses, extending the working life of equipment with roots reaching back to the 1950s.
Founded in 1992 by two former data-communications catalog specialists, Pittsburgh-based DigitHead manufactures custom networking cables, adapters, and assemblies for OEMs and system integrators. The certified Woman Owned Small Business combines reverse engineering and prototyping with 100% cable testing, supplying both specialized builds and standard network products. DigitHead has been making custom assemblies for more than 30 years and offers U.S.-made and TAA-compliant options.
Diligent Instruments Corporation is dedicated to providing various instruments for the power measurement and automotive maintenance industries under the brand DLG. The company focuses on electrical test and measurement areas, offering reliable products ranging from insulation resistance testers to automotive battery analyzers.
Dimension Supply Inc. was founded in 2004 by Kirk Whitaker and Mark Zwiener, whose careers in mining and dimension stone shaped the company’s early focus. From its Pennsylvania base, it has grown from a specialist distributor into a nationwide supplier and sole-source manufacturer of KINEPAK® since acquiring the product in 2018.