423810

Construction and Mining (except Oil Well) Machinery and Equipment Merchant Wholesalers

Wholesale Trade › Merchant Wholesalers, Durable Goods › Machinery, Equipment, and Supplies Merchant Wholesalers

SBA Size Standard

500 employees

Employee-Based Verify at SBA.gov →

NAICS Code Hierarchy

42

Sector

Wholesale Trade

423

Subsector

Merchant Wholesalers, Durable Goods

4238

Industry Group

Machinery, Equipment, and Supplies Merchant Wholesalers

423810

National Industry (This Code)

Construction and Mining (except Oil Well) Machinery and Equipment Merchant Wholesalers

Official NAICS Description

Source: U.S. Census Bureau 2022 NAICS

📘 Source: U.S. Census Bureau — 2022 NAICS Manual
This industry comprises establishments primarily engaged in the merchant wholesale distribution of specialized machinery, equipment, and related parts generally used in construction, mining (except oil well), and logging activities. Illustrative Examples: Excavating machinery and equipment merchant wholesalers Road construction and maintenance machinery merchant wholesalers Forestry machinery and equipment merchant wholesalers Scaffolding merchant wholesalers Mining cranes merchant wholesalers

✓ 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 423810

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 the merchant wholesale distribution of oil well machinery and equipment are classified in Industry 423830, Industrial Machinery and Equipment Merchant Wholesalers.

How to Use NAICS 423810 in SAM.gov

NAICS code 423810Construction and Mining (except Oil Well) Machinery and Equipment Merchant Wholesalers — 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 Machinery, Equipment, and Supplies Merchant Wholesalers 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 423810.

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Frequently Asked Questions

What is NAICS code 423810?

NAICS code 423810 is 'Construction and Mining (except Oil Well) Machinery and Equipment Merchant Wholesalers', classified under the Wholesale Trade sector (NAICS 42). This industry comprises establishments primarily engaged in the merchant wholesale distribution of specialized machinery, equipment, and related parts generally used in construction, mining (except oi

What is the SBA small business size standard for NAICS code 423810?

The SBA defines a small business under NAICS code 423810 (Construction and Mining (except Oil Well) Machinery and Equipment Merchant Wholesalers) 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 423810 in SAM.gov?

To register NAICS code 423810 in SAM.gov: (1) Log in at sam.gov, (2) Navigate to your Entity Registration, (3) Go to the Assertions section, (4) Add 423810 (Construction and Mining (except Oil Well) Machinery and Equipment Merchant Wholesalers) 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 Machinery, Equipment, and Supplies Merchant Wholesalers

Related PSC Codes

PSC codes commonly used with this NAICS sector

Source: GSA PSC Manual April 2025

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