NAICS 3327

Machine Shops; Turned Product; & Screw, Nut, & Bolt Manufacturing

Machine shops, turned product, and screw, nut, and bolt manufacturing (NAICS 3327). Precision metal fastener and component industry overview.

Industry at a Glance

Sector-wide aggregates across all businesses classified under NAICS 3327 (2017 classification frame). For specific sub-industries within this sector, see the individual reports below.

Employment
364K
US Census CBP · 2023 · NAICS 2017
Establishments
22K
US Census CBP · 2023 · NAICS 2017
Annual Payroll
$23.3B
US Census CBP · 2023 · NAICS 2017
Avg Annual Wage
$64,201
Derived from US Census CBP · 2023 · NAICS 2017
Market Size
$81.1B
US Census Economic Census · 2022 · NAICS 2017

Industry Overview

NAICS 3327 encompasses machine shops, turned product manufacturers, and screw, nut, and bolt producers—specialized facilities that fabricate precision metal components through machining, threading, and cold forming processes. This industry group serves as a critical intermediate manufacturer, supplying standardized and custom fasteners, shafts, pins, and other precision parts to automotive, aerospace, construction, machinery, and consumer goods manufacturers. These businesses range from small job shops performing contract machining to larger facilities with advanced CNC capabilities, serving both domestic and international markets with components that require tight tolerances and specialized metallurgical properties.

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Industry Trends

CNC

Advanced manufacturing technologies including multi-axis CNC machines, robotics, and automation are increasing productivity and enabling tighter tolerances, though adoption requires significant capital investment particularly among smaller shops.

02

Supply chain diversification and nearshoring initiatives have strengthened demand for domestic fastener and precision component production, reversing decades of overseas sourcing pressure.

03

Industry 4.0 adoption including IoT-enabled equipment monitoring, predictive maintenance, and real-time production tracking is improving efficiency and reducing waste in machine shop operations.

04

Skilled workforce shortages persist as experienced machinists and tool makers retire, driving wages upward and forcing shops to invest in apprenticeship programs and manufacturing education partnerships.

05

Sustainability initiatives and circular economy practices are gaining traction, with manufacturers implementing coolant recycling, material waste reduction, and energy-efficient equipment upgrades.

Frequently Asked Questions

What is NAICS 3327? ▾
NAICS 3327 is the classification for Machine Shops; Turned Product; and Screw, Nut, and Bolt Manufacturing. It includes establishments primarily engaged in manufacturing metal fasteners, precision machined parts, and turned products through processes like machining, threading, and cold forming. This industry group serves manufacturers across multiple sectors requiring precision metal components.
What types of products does this industry manufacture? ▾
This industry produces screws, bolts, nuts, rivets, pins, shafts, and turned products made from steel, stainless steel, aluminum, and other metals. Products are supplied to automotive, aerospace, machinery, construction, and appliance manufacturers. Components range from standardized fasteners manufactured in high volumes to custom precision parts produced in lower quantities for specialized applications.
What are the primary challenges facing machine shops and fastener manufacturers? ▾
Key challenges include intense price competition from international suppliers, finding and retaining skilled machinists in a tight labor market, managing volatile raw material costs, and maintaining profitability on thin margins. Additionally, smaller shops struggle with capital requirements for technology upgrades, quality certification compliance, and supply chain complexity in serving large OEM customers.
How important are quality certifications in this industry? ▾
Quality certifications such as ISO 9001, AS9100 (aerospace), and IATF 16949 (automotive) are critical competitive requirements, particularly for manufacturers supplying OEMs in regulated industries. These certifications demonstrate process controls, traceability, and reliability, and are often mandatory for winning and retaining major customer contracts.
What is driving recent growth in domestic machine shop demand? ▾
Supply chain resilience concerns, tariff policies, and customer preferences for nearshore manufacturing have increased demand for domestic fastener and precision component production. Additionally, reshoring of manufacturing and increased domestic infrastructure spending have boosted orders from machinery and construction equipment manufacturers.

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