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NAICS Code· 331512

NAICS 331512: Steel Investment Foundries

This U.S. industry comprises establishments primarily engaged in manufacturing steel investment castings. Investment molds are formed by covering a wax shape with a refractory slurry. After the refractory slurry hardens, the wax is melted, leaving a seamless mold. Investment molds provide highly detailed, consistent castings. Establishments in this industry purchase steel made in other establishments. Cross-References. Establishments primarily engaged in--Show more

NAICS 331512 – Steel Investment Foundries encompasses the production of precision metal components through the investment casting process, commonly used to manufacture complex, high-strength steel parts with tight dimensional tolerances. This sector serves critical defense, aerospace, and energy applications where components must withstand extreme thermal and mechanical stresses, such as turbine blades, valve bodies, and structural fittings.

5
Active Contracts
$369K
Total Obligations (12mo)
28
Awarded Contracts (12mo)
20
Contractors Awarded (12mo)
3
Median Bidders per Award
-42.6%
YoY Growth

Contract Opportunities

Active solicitations and awarded contracts classified under NAICS 331512 — Steel Investment Foundries.

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NAICS 331512 FAQ

Frequently Asked Questions

NAICS code 331512 covers Steel Investment Foundries. This U.S. industry comprises establishments primarily engaged in manufacturing steel investment castings. Investment molds are formed by covering a wax shape with a refractory slurry. After the refractory slurry hardens, the wax is melted, leaving a seamless mold. Investment molds provide highly detailed, consistent castings. Establishments in this industry purchase steel made in other establishments. Cross-References. Establishments primarily engaged in--

Recently Posted in Steel Investment Foundries

NAICS: 331512
Awarded
DIBBS
CONNECTING LINK, RIGID
Solicitation # SPE7L3-26-T-201G
This solicitation is for the procurement of 31 rigid connecting links, identified by NSN 3040-01-386-3462, with a specific tan color requirement per AMS-STD-595. The items must be produced using a metal casting process, which necessitates the use of specialized tooling. Delivery is required within 168 days after the order is placed. Compliance requirements include CMMC Level 2 certification and adherence to DLA packaging and quality standards. Due to the nature of the technical data, this contract is subject to strict export controls under ITAR and EAR regulations, requiring contractors to have an approved US/Canada Joint Certification Program certification and completed export-control training. The solicitation was posted by the Department of Defense Land Supplier Operations Vehicle Support with a response deadline of August 31, 2026.
Defense Logistics Agency

POSTED

1 day ago

DEADLINE

N/A
View Details
NAICS: 331512
New
DIBBS
COUPLING HALF, QUICK DI
Solicitation # SPE7M3-26-T-8678
This contract is for the procurement of six quick disconnect coupling halves, identified by NSN 4730011916203. The items are associated with part numbers 586R326H05 from Northrop Grumman Systems Corporation and AE82998G from Eaton Aeroquip LLC. This is designated as a critical application item with a required delivery date of May 17, 2027, and a delivery window of 250 days after order. The agreement specifies that delivery is FOB Origin with inspection and acceptance occurring at the destination, specifically the DLA Distribution Depot Oklahoma at Tinker AFB. Packaging must comply with ASTM D3951 and MIL-STD-129, while adhering to DLA master list technical and quality requirements, including specific standards for packaging, measuring and test equipment, and the removal of government identification from non-accepted supplies.
FLUID HANDLING DIVISION

POSTED

2 days ago

DEADLINE

in 11 days
View Details
NAICS: 331512
New
DIBBS
COUPLING ASSEMBLY, QUIC
Solicitation # SPE7M4-26-T-365R
This solicitation from the Department of Defense Fluid Handling Division is for the procurement of 18 quick disconnect coupling assemblies, identified by NSN 4730-01-201-3315. The contract requires delivery within 133 days after receipt of order and mandates adherence to DLA packaging requirements. The technical data associated with this item is subject to strict export controls under ITAR and EAR regulations, meaning it cannot be shared with foreign persons or exported without government authorization. To access this data, contractors must hold an approved US/Canada Joint Certification Program certification and complete specific DLA export-control training and questionnaires.
FLUID HANDLING DIVISION

POSTED

3 days ago

DEADLINE

in 11 days
View Details
NAICS: 331512
New
DIBBS
COUPLING HALF, QUICK
Solicitation # SPE7M3-26-T-8605
Solicitation SPE7M3-26-T-8605 is a federal request for 102 units of Quick Coupling Halves (NSN 4730-00-773-2409) for the Department of Defense Fluid Handling Division, with a delivery requirement of 62 days after receipt of order. Offerors must provide details of current dealer or distributor certifications and are encouraged to submit quantity ranges to accommodate volatile demand. The solicitation prohibits the use of additive manufacturing unless specifically authorized and requires a representation that no covered telecommunications equipment or services will be provided. Compliance with domestic material restrictions, including the Buy American Act and the Berry Amendment, is mandatory, with specific disclosure required for non-domestic materials. Small business joint ventures must submit required representations and certifications per FAR and DFARS guidelines. Additionally, all contractors must prepare for a transition to the Account Management and Provisioning System (AMPS) to maintain access to the Vendor Shipment Module (VSM) for shipping purposes.
FLUID HANDLING DIVISION

POSTED

3 days ago

DEADLINE

in 11 days
View Details
NAICS: 331512
Closed
DIBBS
Aluminum Alloy Sheet Manufacturing and SupplyThis subcontract opportunity, issued by the Department of Defense through Warner Robins, involves the manufacture and delivery of a single aluminum alloy Alclad 7475-T761 sheet. The required material must adhere to precise dimensions and cladding standards to meet strict military and aerospace specifications. Performance for this contract will take place at Robins Air Force Base. The procurement is designated as a total small business set-aside under FAR 19.5, falling under NAICS code 331512. Interested parties must submit their responses by August 27, 2026, following the posting date of August 16, 2026.
WARNER ROBINS

POSTED

12 days ago

CLOSED

1 day ago
View Details
NAICS: 331512
Closed
DIBBS
Aluminum Alloy 5456 Bar Supply (Extruded, Round)This subcontract through the Defense Logistics Agency under the Department of Defense involves the supply of extruded round aluminum alloy 5456-H111 bars. The required specifications include a diameter of 0.750 inches and lengths ranging from 10 to 12 feet. Critical requirements for this order include strict material traceability and adherence to military-standard packaging and marking protocols. The procurement is categorized under NAICS code 331512 and is set for performance at FPO 96349. The solicitation was posted on August 16, 2026, with a response deadline of August 27, 2026.
Defense Logistics Agency

POSTED

12 days ago

CLOSED

1 day ago
View Details
NAICS: 331512
Closed
DIBBS
COUPLING HALF, QUICK DI
Solicitation # SPE7M4-26-T-343X
This contract is for the procurement of seven quick disconnect coupling halves, identified as NSN 4730010152907 and Eaton Aeroquip part number AE97569J. This is designated as a critical application item. The delivery is required within 168 days, with a need ship date of February 12, 2027, and a final required delivery date of March 7, 2027. The items are to be delivered FOB Origin and will be received at the DLA Distribution Depot Oklahoma at Tinker AFB. The supplier must adhere to specific technical and quality requirements as outlined in the DLA Master List, including RP001 for packaging and MIL-STD-129 for marking and labeling. Packaging must comply with ASTM D3951, though DLA Master List requirements take precedence. Inspection and acceptance will occur at the destination. The contract is managed by the Department of Defense Fluid Handling Division under solicitation number SPE7M4-26-T-343X.
FLUID HANDLING DIVISION

POSTED

12 days ago

CLOSED

1 day ago
View Details
NAICS: 331512
Closed
DIBBS
COUPLING HALF, QUICK
Solicitation # SPE7M3-26-T-8278
This contract is for the procurement of two aluminum alloy quick disconnect coupling halves with a one inch outer diameter tube size and a 500 PSI operating pressure. The items feature a female quick disconnect end and a male threaded end. This is designated as a critical application item with no shelf life requirement. Compatible part numbers include Northrop Grumman 582R231H02 and Eaton Aeroquip AE97698M. The order is managed under solicitation SPE7M3-26-T-8278 for the Department of Defense Fluid Handling Division. Delivery is required within 168 days, with a final required delivery date of December 21, 2027, shipped FOB Origin to the DLA Distribution Depot at Tinker AFB, Oklahoma. Packaging must adhere to ASTM D3951 and MIL-STD-129, while following DLA master list technical and quality requirements. Additionally, the use of Class I ozone depleting chemicals is strictly prohibited.
FLUID HANDLING DIVISION

POSTED

12 days ago

CLOSED

1 day ago
View Details
NAICS: 331512
Closed
DIBBS
COUPLING HALF, QUICK
Solicitation # SPE7L0-26-T-0400
This contract, identified as SPE7L0-26-T-0400, is a solicitation from the Department of Defense Land Supply Chain ESOC Buys for the procurement of 20 units of Quick Coupling Halves. The items are identified by NSN 4730-01-478-1377 and part number 216232 from Cadillac Gage Textron Inc. The required delivery date is August 11, 2026, with a delivery timeframe of five days after order. The shipment must be delivered FOB Origin to the DLA LMP Zone 1 facility in Texarkana, Texas, using the fastest traceable means. Compliance with DLA packaging requirements RP001, ASTM D3951, and MIL-STD-129 is mandatory. Technical and quality requirements are governed by the DLA Master List, and the contract specifies a zero percent quantity variance for the order.
LAND SUPPLY CHAIN ESOC BUYS

POSTED

17 days ago

CLOSED

4 days ago
View Details
NAICS: 331512
Closed
DIBBS
Supply of Aluminum Alloy 7075-T6 Flat Bar
WARNER ROBINS

POSTED

17 days ago

CLOSED

4 days ago
View Details
NAICS: 331512
Closed
DIBBS
COUPLING HALF, QUICK DI
Solicitation # SPE7M3-26-T-8172
This contract is for the procurement of 421 units of a critical quick disconnect coupling half, identified by NSN 4730-01-329-8316 and Electric Boat Corporation part number 211038564. The hardware features a 0.250 inch copper alloy body with a twist-lock, self-sealing internal quick disconnect and a threaded external pipe first fluid end connection. As a restricted source item, it requires engineering source approval by the government design control activity. The agreement mandates strict adherence to DLA technical and quality requirements, including specific packaging standards and the prohibition of class I ozone depleting chemicals and intentional mercury use. Delivery is set for the DLA Distribution New Cumberland facility in Pennsylvania, with a required delivery date of May 10, 2027. The contract specifies a zero percent quantity variance and requires inspection and acceptance at the destination.
FLUID HANDLING DIVISION

POSTED

17 days ago

CLOSED

7 days ago
View Details
NAICS: 331512
Closed
DIBBS
Precision Aluminum Sheet Metal ManufacturingThe contract entails the manufacture of aerospace-grade aluminum alloy 2024 T3 sheet metal to meet strict military standards, encompassing precision cutting, rigorous testing, and proper packaging to ensure compliance with performance and safety requirements. The work is to be performed at Tinker Air Force Base in Oklahoma, with all processes adhering to the technical specifications and quality controls mandated for defense applications. The subcontract is part of a broader Department of Defense procurement initiative, issued by DEPOT OKLAHOMA under NAICS code 331512, which classifies it as a non-set-aside procurement for the production of rolled metal products. Interested suppliers must submit responses by the deadline of August 20, 2026, following the instructions provided through the DIBBS platform, and are expected to demonstrate proven capability in producing high-integrity aerospace materials to support military aviation and structural components.
DEPOT OKLAHOMA

POSTED

19 days ago

CLOSED

8 days ago
View Details

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