Since 1931, Ross Aluminum has operated in Sidney as a custom aluminum casting foundry, producing castings for aerospace, automotive, defense and small-engine applications. The company combines dry-sand, green-sand and permanent-mold work with in-house inspection and finishing capabilities, and its aerospace work is supported by AS9100 Rev D, ISO 9001:2015 and NADCAP approvals for special processes. Ross became part of minority business holding company P&THE Manufacturing in 2022, which kept the foundry operating under new ownership and management.
ISO 9001:2015
AS9100 Rev D
NADCAP Heat Treat
NADCAP NDT
NADCAP Weld
Thompson Aluminum Casting CompanyFounded by Roy Thompson in 1946, Thompson Aluminum Casting Company is a Cleveland-area foundry producing aluminum and magnesium castings, with a particular focus on aerospace and defense components. The Thomas family took ownership in 1972, and Brian Thomas now leads the company in its third generation of family ownership from a 60,000-square-foot Ohio facility. Thompson is Nadcap accredited and certified to ISO 9001 and AS9100, credentials that support its long-standing work for aerospace manufacturers.CLEVELAND, OH
Aluminum Alloys IncAluminum Alloys Inc. is a Pennsylvania foundry that makes assembly-ready aluminum sand castings, including large and complex parts, with machining available under one roof. In business for over 60 years, the company operates from a 150,000-square-foot facility and has produced more than 6,000 unique parts. It is ISO 9001 certified and ITAR registered, with castings used across industries including aerospace and military.SINKING SPRING, PA
Littlestown Foundry, IncChartered in 1916, Littlestown Foundry is a Pennsylvania aluminum sand-casting foundry that now produces more than 95% of its business in commercial aluminum castings. The company has grown from a 16-person gray-iron operation into a 70-employee facility with in-house machining and testing, serving customers across sectors including electrical, firefighting and aerospace. Its quality management system has been ISO 9001 certified since 2003.LITTLESTOWN, PA
Boose Aluminum Foundry Co., IncFour generations of family ownership have shaped Boose Aluminum Foundry Co., Inc. into an American-made aluminum sand-casting foundry, producing parts for demanding applications since 1933. Its Stevens, Pennsylvania, team combines long foundry experience with product-development support and in-house quality checks, including digital radiography and dimensional inspection. Boose is ISO 9001:2015 certified and ITAR registered, with particular experience serving defense and other industries where traceable, dependable castings matter.331524STEVENS, PA