Small Black Screws For Plastic Black Oxide Fasteners Plus Head

Small black screws are mainly used in electronics or plastics. The round washer head design could possibly be the most versatile head design available. It combines the advantages of the round head but has a washer built onto the head to increase head diameter and prevent over driving in softwoods while providing a maximum bearing surface. Ever Hardware provides custom-made fasteners and customizable packaging.

Plus drive is also known as phillips or cross drive. The Phillips screw drive was created by John P. Thompson, who after failing to interest manufacturers, sold his design to businessman Henry F. Phillips. Phillips is credited with forming a company (Phillips Screw Company), improving the design, and promoting the adoption of his product. The original patent expired in 1966, but the Phillips Screw Company continued to develop improved designs.
Phillips drive bits are often designated by the letters “PH”, plus a size code 0000, 000, 00, 0, 1, 2, 3, or 4 (by order of increasing size); the numerical bit size codes do not necessarily correspond to nominal screw size numbers.
Black oxide or blackening is a conversion coating for ferrous materials, stainless steel, copper and copper based alloys, zinc, powdered metals, and silver solder. It is used to add mild corrosion resistance, for appearance and to minimise light reflection. To achieve maximal corrosion resistance the black oxide must be impregnated with oil or wax. One of its advantages over other coatings is its minimal buildup.

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