324121

Asphalt Paving Mixture and Block Manufacturing

Manufacturing › Petroleum and Coal Products Manufacturing › Petroleum and Coal Products Manufacturing

SBA Size Standard

500 employees

Employee-Based Verify at SBA.gov →

NAICS Code Hierarchy

32

Sector

Manufacturing

324

Subsector

Petroleum and Coal Products Manufacturing

3241

Industry Group

Petroleum and Coal Products Manufacturing

324121

National Industry (This Code)

Asphalt Paving Mixture and Block Manufacturing

Official NAICS Description

Source: U.S. Census Bureau 2022 NAICS

📘 Source: U.S. Census Bureau — 2022 NAICS Manual
This U.S. industry comprises establishments primarily engaged in manufacturing asphalt and tar paving mixtures and blocks from purchased asphaltic materials.

✓ Small Business Eligibility at a Glance

Based on SBA Table of Small Business Size Standards (2024)

Size Standard

500 employees

Measurement Period

Current count

Standard Type

Employee-Based

Applies To

All contracts under NAICS 324121

Set-Aside Programs

8(a), WOSB, HUBZone, SDVOSB

Certification Required

No (self-certify in SAM.gov)

Size standards are set by the SBA and reviewed periodically. Always verify at SBA.gov before bidding.

Cross-References

The following activities are classified elsewhere in the NAICS system:

Establishments primarily engaged in refining crude petroleum and manufacturing asphalt and tar paving mixtures and blocks are classified in Industry 324110, Petroleum Refineries.

How to Use NAICS 324121 in SAM.gov

NAICS code 324121Asphalt Paving Mixture and Block Manufacturing — is used in SAM.gov to identify businesses whose primary activity falls within this classification. When you add this code to your SAM.gov entity registration, contracting officers searching for vendors in the Petroleum and Coal Products Manufacturing space will be able to find your business.

If this code represents your primary business activity, designate it as your primary NAICS code. Your primary NAICS code determines your size standard for any contract solicited under this code. With a size standard of 500 employees, your business must be at or below this threshold to qualify as a small business for set-aside contracts under NAICS 324121.

Log in Entity Registration Goods & Services Add NAICS Code Enter 324121 Save

Frequently Asked Questions

What is NAICS code 324121?

NAICS code 324121 is 'Asphalt Paving Mixture and Block Manufacturing', classified under the Manufacturing sector (NAICS 32). This U.S. industry comprises establishments primarily engaged in manufacturing asphalt and tar paving mixtures and blocks from purchased asphaltic materials. Cross-References.

What is the SBA small business size standard for NAICS code 324121?

The SBA defines a small business under NAICS code 324121 (Asphalt Paving Mixture and Block Manufacturing) as one with 500 employees. This size standard determines eligibility for small business set-aside contracts, 8(a), HUBZone, WOSB, and SDVOSB programs in SAM.gov.

How do I register NAICS code 324121 in SAM.gov?

To register NAICS code 324121 in SAM.gov: (1) Log in at sam.gov, (2) Navigate to your Entity Registration, (3) Go to the Assertions section, (4) Add 324121 (Asphalt Paving Mixture and Block Manufacturing) to your NAICS code list. You may designate one code as your Primary NAICS code.

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Related NAICS Codes

Other codes in Petroleum and Coal Products Manufacturing

Related PSC Codes

PSC codes commonly used with this NAICS sector

Source: GSA PSC Manual April 2025

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