12-24 x 1 1/2 Phillips Truss Full Contour Machine Screw Fully Threaded Zinc M3.5-6 while the fillister head provides

while the fillister head provides a flush

They have a hex shape for easy tightening and loosening with a wrench

5/8" x 4" Hex Lag Screw Galvanized Gimlet Point is a high-quality screw designed for heavy-duty applications

This screw is made of steel and has a Grade 8 rating

12-24 x 1 1/2 Phillips Truss Full Contour Machine Screw Fully Threaded Zinc M3.5-6 while the fillister head providesThese 12 24 x 1 1 2 Phillips Truss Full Contour Machine Screws are fully threaded and made of zinc plated steel. They have a truss head with a Phillips drive and are designed for use in a variety of applications. The zinc plating provides corrosion resistance, making them suitable for use in both indoor and outdoor environments. These screws are strong and durable, and they can be easily installed with a Phillips screwdriver.