Pam Berry
SCREWS: Duplex screws
Owner | VP of Marketing Advance Components
What is the difference between Duplex Nails and Screws? Studies show that Duplex Screws can be installed as fast as 45 screws per minute compared to Duplex Nails at 24 per minute.
Duplex Nails and Screws are flangedhead or double-headed fasteners that are often used to build temporary structures such as braces, scaffolding, and concrete formwork. They’re designed to be removed with ease, so they do not completely go into the wood during installation. First came the nail Duplex Nails are as strong as regular nails, but the double head makes them easier to remove with a claw hammer or crowbar. Workers drive the nail until the lower flange is flush with the material. With a pull bar or the reverse end of a claw hammer, the nails pull out after the job is complete. Depending on the application, if a lot of force or bending is necessary to remove the nails, they might not be reusable. William Arthur Collings of Missouri received a patent for the Duplex Nail in 1917. His description detailed how the double-headed nail was ideal for use on concrete forms because it was easy to remove compared to regular nails, without damaging the forms.
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December 2021
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