This industry comprises establishments primarily engaged in the merchant wholesale distribution of supplies for machinery and equipment generally used in manufacturing, oil well, and warehousing activities.

Cross-References. Establishments primarily engaged in--

• Merchant wholesale distribution of hydraulic and pneumatic (fluid power) pumps, motors, pistons, and valves--are classified in U.S. Industry 423830, Industrial Machinery and Equipment Merchant Wholesalers; and
• Merchant wholesale distribution of welding gases--are classified in U.S. Industry 424690, Other Chemical and Allied Products Merchant Wholesalers.