4-40 x 5/8 Phillips Flat Machine Screw Fully Threaded 18-8 Stainless Steel NSTBZ while the 1/4-20 thread size

while the 1/4-20 thread size fits standard 1/4-inch bolts

This screw is perfect for securing heavy objects to wood

These 10-16 x 4 Phillips Bugle Head Full Thread Self Drilling Drywall Screws in Black Phosphate provide a secure and durable hold for drywall applications

Black Zinc and Bake is a durable and reliable washer designed to prevent loosening of bolted joints due to vibration or shock

4-40 x 5/8 Phillips Flat Machine Screw Fully Threaded 18-8 Stainless Steel NSTBZ while the 1/4-20 thread sizeThis 4 40 x 5 8 Phillips flat machine screw is made of 18 8 stainless steel, making it corrosion resistant and durable. It has a fully threaded body, which provides a strong hold in a variety of materials. The Phillips drive type allows for easy installation and removal with a Phillips screwdriver. This screw is commonly used in a variety of applications, including electronics, appliances, and machinery.