4-40 x 5/16 Phillips Flat Undercut Machine Screw Fully Threaded Black Zinc M6-1.00 The case hardening process enhances

The case hardening process enhances their durability and resistance to wear

Constructed from high-quality zinc

including concrete fencing

making it easy to assemble and disassemble

while the lag thread ensures a strong hold in wood or other soft materials

4-40 x 5/16 Phillips Flat Undercut Machine Screw Fully Threaded Black Zinc M6-1.00 The case hardening process enhancesThis 4 40 x 5 16 Phillips flat undercut machine screw is fully threaded and coated in black zinc for corrosion resistance. It has a Phillips drive and a flat undercut head, which provides a flush, low profile finish when countersunk. This screw is commonly used in a variety of applications, including electronics, appliances, and furniture. It is made of steel and meets ASTM standards for quality and durability.