8 x 1 5/8 Flat Head Nibbed Square Drive Deep Thread Wood Screw Type 17 2/3 Thread Zinc & Bake 1/4-20-2B and the threads on the

and the threads on the bolt engage with the metal or wood

this screw provides exceptional strength and longevity

These 8-15 x 3/4 Square Pan Self Tapping Screw Type A Fully Threaded 18-8 Stainless Steel screws are designed for use in a variety of applications

This 10-24 x 4 1/2 Phillips flat machine screw is fully threaded and made of zinc

8 x 1 5/8 Flat Head Nibbed Square Drive Deep Thread Wood Screw Type 17 2/3 Thread Zinc & Bake 1/4-20-2B and the threads on the8 x 1 5 8 Flat Head Nibbed Square Drive Deep Thread Wood Screw Type 17 2 3 Thread Zinc & Bake These screws are designed for use in wood applications. They have a flat head with a nibbed square drive, which helps to prevent the screw from slipping during installation. The deep thread design provides a strong hold in wood, and the zinc and bake coating provides corrosion resistance. These screws are available in a variety of lengths and diameters to