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Whether you are building some great looking 2 x 4 furniture or doing a bit of light framing, ProMax™ Optimized Thread Length™ screws will make construction easier. The extra long unthreaded shank prevents cross-threading or jacking without the need for a clearance hole, and the 1/8" length system allows use of the longest screw possible without fear of backside protrusion. These Square Drive screws have self drilling auger points, self countersinking nibs, and have a light “lube” finish suitable for interior, non-visible applications. Made in Taiwan. #2 Square Recess. Unthreaded Length 1-9/16"
ProMax™ Optimized Thread Length™: What It Means and Why You’ll Like It!Deck screws are a good example of Optimized Thread Length. The screws normally used to install 2 x 4’s or 2 x 6’s for decking are 3 inches long and have 1 inch of unthreaded shank. Since 2 x 4 and 2 x 6 deck material is 1-1/2 inches thick, the threads bridge the joint, as shown, resulting in an uneven and unsightly surface, or screws that are over-driven trying to “pull the board down.”
ProMax™ screws are different: Thread length is optimized to eliminate crossthreading, and the 1/8” length system allows use of the longest possible screw. In most cases, the smooth shank and self-drilling point allow installation without predrilling! Just select a screw that provides an unthreaded shank length equal to or slightly greater than the material thickness being fastened.
(based on 2 reviews)
Reviewed by 2 customers
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not exactly as described in the catalog
from Cincinnati, OH
About Me Avid Do-It-Yourselfer
Comments about 10 x 3-7/8 ProMax Wood Deck Screws, Unplated Steel, Flat Head, Square Drive:
I'm disappointed that the screws I received have a combo drive, not the square drive pictured in the catalog and online. Also, the unthreaded length is not quite as long as described, but the minor difference should not affect performance.
Bottom Line Yes, I would recommend this to a friend
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Ideal for 2X4 construction projects.
from Cottonwood Falls, Kansas
I purchased these #10x3 7/8 flat head screws because of my 2X4 construction potting bench project. I predrilled the needed holes and then securely fastened the lumber sections with the above screws. This bench is extremely solid and should last for many many years.A highly recommended product and would definitely use again on other projects!