Hex Socket Self Tapping Screws, 5.5 x 19mm 410 Stainless Steel Sheet Metal Flat Head Drilling Screw 150pack, Black

Made of 410 stainless steel, which has higher hardness, corrosion resistance and rust resistance.
The self-drilling screws can drill well into the wood, sheet metal and other surfaces. The thread can reduce the resistance when screwing in and prevent cracking.
It can also connect metal hardware to the wood well because the threaded rods provide good retention in the wood.
Widely used in various industries such as manufacturing, construction, engineering, and assembly.