M7 Countersunk Bolts Carbon Steel Black Oxide Hexagonal Socket DIN 7991 Metric Flat Bolt Allen Screws Fasteners Counter Sunk Recessed Internal Hex

The m7 countersunk bolts are the bolt with a 7mm diameter external thread and countersunk or CSK head. It can be hexagon/allen, Phillips, Torx, Slot, Square drive. Countersunk allows the head of a countersunk bolt or screw when placed in the hole, to sit flush with or below the surface of the surrounding material (by comparison, a counterbore makes a flat-bottomed hole that might be used with a socket-head capscrew). A countersink may also be used to remove the burr left from a drilling or tapping operation thereby improving the finish of the product and removing any hazardous sharp edges. Ever Hardware Industrial Limited aimed to be the best precision m7 countersunk screws supply company of cold forming services. At the same time, we provide a customizable package according to your request.

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 minimize light reflection. To achieve maximum 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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