12-24 x 1/2 Phillips Pan External Sems Machine Screw Fully Threaded Zinc ABPT and the 40 indicates that

and the 40 indicates that the screw has a length of 40mm

The screws are designed for use in metal applications and have a sharp point that allows them to easily penetrate the metal

The 1/4-20 x 2 Unslotted Hexwasher Self Drilling Screw #5 Point Full Thread Zinc & Bake is a versatile and durable fastener designed for a wide range of applications

This nut is designed to resist loosening due to vibration or movement

12-24 x 1/2 Phillips Pan External Sems Machine Screw Fully Threaded Zinc ABPT and the 40 indicates thatThese 12 24 x 1 2 Phillips pan external sems machine screws are fully threaded and zinc plated. They are designed for use in a variety of applications, including metal, wood, and plastic. The Phillips pan head provides a secure hold, while the zinc plating offers corrosion resistance. These screws are available in a variety of lengths to meet your specific needs.