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They are non-ribbed
These screws feature a unique square flat nib design that provides superior grip and prevents cam-out during installation
The bolt has a diameter of 5/8 inches and a length of 9 1/2 inches
these screws are sure to withstand the elements and provide years of trouble-free service
1/4-20 x 4 Phillips Flat Machine Screw Fully Threaded Black Zinc 3/4-16 N1610 They are non-ribbedThis 1 4 20 x 4 Phillips flat machine screw is fully threaded and coated in black zinc for corrosion resistance. It has a Phillips drive and a flat head, making it easy to install and remove. The 1 4 20 thread size means that it has a diameter of 1 4 inch and 20 threads per inch. The 4 inch length is measured from the underside of the head to the tip of the screw. This screw is commonly used in a variety of applications, including furniture assembly,
