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HDC Inc. is a power locking, security and component supplier, manufacturer and distributing company.
Flat Act Series
PL Series

OEM Power Locking

Security and Relay Controllers
Security and Relay Controllers

Top Pop, Compressors, and Components
Top Pop, Compressors, and Components


Air Horns

Pneumatic Rams


What's New
Selecting Your Products
How To Buy

It is our privilege to have the opportunity to be your hardware and power lock supplier. Open and print the 5 page PDF file below. These documents are necessary to create your account. Fax or mail the completed 3 pages to HDC

Page 2-Terms and Conditions
Please read our Terms and Conditions, which are concise but are limited to individual warrantees of many products. Please ask for product warrantees specifically by type of device or locate more information on this website.

Page 3-Credit Application and Page 4-Credit Card Purchasing
All new customers are required, prior to delivery of any product paid for by check, to complete our Purchase Agreement Form. All net accounts, old and new, buying one thousand dollars or more, are required to complete and have approved prior to shipment a HDC Credit Application Form.

Page 5-Resale Certificate
All Texas tax-exempt buyers are required to present HDC Inc. with a valid resale permit.

When completed please return by fax or mail the below information. It will take 2-4 weeks to process for approvals.

1. Complete Purchase Agreements or a Credit Application.
2. Completed Resale Form (for Texas buyers only).

Each page can be found at this link, 5 page PDF file.

We want a clear and mutual understanding of your specific product needs with our assurance they will remain confidential.

Our mission statement:
If it's not useful, original, desirable and a value “We don't have it.”

HDC is looking forward to being your supplier for the long haul.


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Power Locking, Security Products, Hardware and Components for Fleets, Trucks, Ambulances, Service Vehicles, RV's, Motor Coaches, Toy Haulers, Trailers