6-32 x 3 Phillips Pan External Sems Machine Screw Fully Threaded Zinc KPFT * Ribbed: No

* Ribbed: No

while the 18mm length refers to the overall length of the screw

5/16-18 x 2 1/4 Hex Cap Screw Grade 2 Non A307 Black Oxide and Oil:

The hex head provides ample grip for tightening with a wrench

it features a sharp gimlet point that easily penetrates wood and other materials

6-32 x 3 Phillips Pan External Sems Machine Screw Fully Threaded Zinc KPFT * Ribbed: NoThis 6 32 x 3 Phillips pan external sems machine screw is fully threaded and made of zinc. It has a Phillips drive and a pan head. The screw is 3 inches long and has a diameter of 6 32. It is designed for use in a variety of applications, including automotive, construction, and manufacturing. The zinc coating provides corrosion resistance and durability.