811310

Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance

Other Services (except Public Administration) › Repair and Maintenance › Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance

SBA Size Standard

$12.5M average annual receipts

Revenue-Based Verify at SBA.gov →

NAICS Code Hierarchy

81

Sector

Other Services (except Public Administration)

811

Subsector

Repair and Maintenance

8113

Industry Group

Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance

811310

National Industry (This Code)

Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance

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 repair and maintenance of commercial and industrial machinery and equipment. Establishments in this industry either sharpen/install commercial and industrial machinery blades and saws or provide welding (e.g., automotive, general) repair services; or repair agricultural and other heavy and industrial machinery and equipment (e.g., forklifts and other material handling equipment, machine tools, commercial refrigeration equipment, construction equipment, and mining machinery).

✓ Small Business Eligibility at a Glance

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

Size Standard

$12.5M average annual receipts

Measurement Period

3-year average

Standard Type

Revenue-Based

Applies To

All contracts under NAICS 811310

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:

Automotive repair (except welding) and maintenance--are classified in Industry Group 8111, Automotive Repair and Maintenance;
Repairing and maintaining electronic and precision equipment--are classified in Industry 811210, Electronic and Precision Equipment Repair and Maintenance;
Oil well rig building, repairing, and dismantling, on a contract basis--are classified in U.S. Industry 213112, Support Activities for Oil and Gas Operations;
On-site welding for building foundations and structures--are classified in Industry 238190, Other Foundation, Structure, and Building Exterior Contractors;
Oil and gas pipeline and related structures construction and repair--are classified in Industry 237120, Oil and Gas Pipeline and Related Structures Construction;
Repairing and servicing aircraft--are classified in Industry 488190, Other Support Activities for Air Transportation;
Converting, rebuilding, and overhauling aircraft--are classified in Industry 33641, Aerospace Product and Parts Manufacturing;
Repairing and servicing railroad cars and engines--are classified in Industry 488210, Support Activities for Rail Transportation;
Rebuilding or remanufacturing railroad engines and cars--are classified in Industry 336510, Railroad Rolling Stock Manufacturing;
Repairing and overhauling ships at floating drydocks--are classified in Industry 488390, Other Support Activities for Water Transportation;
Repairing and overhauling ships at shipyards--are classified in U.S. Industry 336611, Ship Building and Repairing;
Rewinding armatures or rebuilding electric motors on a factory basis--are classified in U.S. Industry 335312, Motor and Generator Manufacturing; and
Repairing and maintaining home and garden equipment (e.g., sharpening or installing blades and saws)--are classified in U.S. Industry 811411, Home and Garden Equipment Repair and Maintenance.

How to Use NAICS 811310 in SAM.gov

NAICS code 811310Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance — 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 Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance 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 $12.5M average annual receipts, your business must be at or below this threshold to qualify as a small business for set-aside contracts under NAICS 811310.

Log in Entity Registration Goods & Services Add NAICS Code Enter 811310 Save

Frequently Asked Questions

What is NAICS code 811310?

NAICS code 811310 is 'Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance', classified under the Other Services (except Public Administration) sector (NAICS 81). This industry comprises establishments primarily engaged in the repair and maintenance of commercial and industrial machinery and equipment. Establishments in this industry either sharpen/install com

What is the SBA small business size standard for NAICS code 811310?

The SBA defines a small business under NAICS code 811310 (Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance) as one with $12.5M average annual receipts. 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 811310 in SAM.gov?

To register NAICS code 811310 in SAM.gov: (1) Log in at sam.gov, (2) Navigate to your Entity Registration, (3) Go to the Assertions section, (4) Add 811310 (Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance) to your NAICS code list. You may designate one code as your Primary NAICS code.

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Related PSC Codes

PSC codes commonly used with this NAICS sector

Source: GSA PSC Manual April 2025

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