423490

Other Professional Equipment and Supplies Merchant Wholesalers

Wholesale Trade › Merchant Wholesalers, Durable Goods › Professional and Commercial 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

4234

Industry Group

Professional and Commercial Equipment and Supplies Merchant Wholesalers

423490

National Industry (This Code)

Other Professional Equipment and Supplies 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 professional equipment and supplies (except ophthalmic goods and medical, dental, and hospital equipment and supplies). Illustrative Examples: Church supplies (except silverware, plated ware) merchant wholesalers School equipment and supplies (except books, furniture) merchant wholesalers Drafting tables and instruments merchant wholesalers Scientific instruments merchant wholesalers Laboratory equipment (except medical, dental) merchant wholesalers Surveying equipment and supplies 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 423490

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:

Merchant wholesale distribution of professional equipment, instruments, and/or goods sold, prescribed, or used by ophthalmologists, optometrists, and opticians, such as ophthalmic frames and lenses, and sunglasses--are classified in Industry 423460, Ophthalmic Goods Merchant Wholesalers;
Merchant wholesale distribution of professional medical equipment, instruments, and supplies used by medical and dental practitioners (except ophthalmic equipment, instruments, and goods used by ophthalmologists, optometrists, and opticians) and medical facilities--are classified in Industry 423450, Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers;
Merchant wholesale distribution of silverware and plated flatware--are classified in Industry 423940, Jewelry, Watch, Precious Stone, and Precious Metal Merchant Wholesalers;
Merchant wholesale distribution of books--are classified in Industry 424920, Book, Periodical, and Newspaper Merchant Wholesalers; and
Merchant wholesale distribution of school furniture--are classified in Industry 423210, Furniture Merchant Wholesalers.

How to Use NAICS 423490 in SAM.gov

NAICS code 423490Other Professional Equipment and Supplies 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 Professional and Commercial 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 423490.

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Frequently Asked Questions

What is NAICS code 423490?

NAICS code 423490 is 'Other Professional Equipment and Supplies Merchant Wholesalers', classified under the Wholesale Trade sector (NAICS 42). This industry comprises establishments primarily engaged in the merchant wholesale distribution of professional equipment and supplies (except ophthalmic goods and medical, dental, and hospital equipm

What is the SBA small business size standard for NAICS code 423490?

The SBA defines a small business under NAICS code 423490 (Other Professional Equipment and Supplies 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 423490 in SAM.gov?

To register NAICS code 423490 in SAM.gov: (1) Log in at sam.gov, (2) Navigate to your Entity Registration, (3) Go to the Assertions section, (4) Add 423490 (Other Professional Equipment and Supplies 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 Professional and Commercial 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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