1/4-14 x 1 1/2 Square Drive Flat Head Fully Threaded Self Drilling Screw 18-8 Stainless Steel 1/4-20-0 and the grade 5 rating

and the grade 5 rating indicates that it is suitable for use in high-stress applications

The 6-32 x 7/8 Phillips Flat Machine Screw Fully Threaded Black Oxide is a versatile and durable screw designed for a wide range of applications

This 10-32 x 1/2 Combo (Slot/Phillips) Indent Hexwasher Machine Screw Full Thread Zinc is a versatile and durable fastener designed for a wide range of applications

3/8-16 x 7/8 Hex Cap Screw Grade 5 Zinc is a high-quality fastener designed for use in various applications

It features a combination of external and internal teeth

1/4-14 x 1 1/2 Square Drive Flat Head Fully Threaded Self Drilling Screw 18-8 Stainless Steel 1/4-20-0 and the grade 5 rating1 4 14 x 1 1 2 Square Drive Flat Head Fully Threaded Self Drilling Screw 18 8 Stainless Steel is a type of screw that is designed to drill its own hole as it is driven into a material. It has a square drive head that is designed to be used with a square drive bit, and a flat head that sits flush with the surface of the material. The screw is made of 18 8 stainless steel, which is resistant to corrosion and rust.