[Specification] : ) Model: M4x20mm; Material: 304 Stainless steel; Screw Total Length: 20mm/0.79"; Pitch: 0.7mm / 0.028"; Screw Head Dia: 8mm / 0.315"; Inner Hex Dia.:2.5mm/0.098"; Screw Groove Type: Inner Hex.. [100% SOLID STAINLESS STEEL] : ) These Flat Head Screws are made of 304 Stainless Steel which is one of the highest forms of corrosion resistant metals, making it last longer than other hardware on the market today.. [SCREWS THAT YOU CAN DEPEND ON] : ) Our Flat Head Machine Screws are very strong and are great for both indoor and outdoor use. This stainless is superior to regular steel and provides excellent rust resistance.. [GREAT TO KEEP AROUND] : ) Flat head socket cap screws are great to have around for use in wet environments and have strong oxidation resistance. They are strong, corrosion resistant, and will support all of your projects.. [WIDELY USED IN] : ) wind power industry, the aerospace industry, office equipment industry, petrochemical industry, the electronics industry, the communications industry, shipbuilding industry, machinery, etc..
