4-DIGIT·INDUSTRY GROUP
Foundries
NAICS code 3315·6 national industries
Foundries produce metal castings by melting and pouring molten metal into molds, then cleaning and finishing the solid parts. Jobs often include foundry operator, mold and core maker, quality inspector, maintenance technician, and production or process support roles. Work is hands-on and safety-focused in a plant environment, with shift schedules and exposure to heat, heavy materials, and standard shop-floor PPE requirements. Some roles may require basic industrial training and safety orientation.
6 national industries within Foundries
Iron Foundries
NAICS code 331511·National industry
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Steel Investment Foundries
NAICS code 331512·National industry
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Steel Foundries (except Investment)
NAICS code 331513·National industry
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Nonferrous Metal Die-Casting Foundries
NAICS code 331523·National industry
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Aluminum Foundries (except Die-Casting)
NAICS code 331524·National industry
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Other Nonferrous Metal Foundries (except Die-Casting)
NAICS code 331529·National industry
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