8-18 x 1/2 Slotted Indented Hex Washer Thread Cutting Screw Type 25 Full Threaded Zinc M3-.5 The flat undercut head is

The flat undercut head is designed to sit flush with the surface of the material being fastened

an indented hex washer head style

split lock washers provide a spring tension that helps keep nuts and bolts from loosening due to vibration

This 1/4-20 x 7/8 Phillips flat machine screw is fully threaded and made of zinc-plated steel

The 3/8-12 x 1 Slotted Indented Hex Washer Self Drilling Screw Full Thread Zinc & Bake is a versatile and durable fastener designed for a wide range of applications

8-18 x 1/2 Slotted Indented Hex Washer Thread Cutting Screw Type 25 Full Threaded Zinc M3-.5 The flat undercut head is8 18 x 1 2 Slotted Indented Hex Washer Thread Cutting Screw Type 25 Full Threaded Zinc: This screw is designed for use in a variety of applications, including wood, metal, and plastic. It has a slotted indented hex washer head that provides a secure hold and prevents the screw from slipping. The thread cutting design allows the screw to create its own threads as it is driven in, eliminating the need for pre drilling. The full threaded design provides