Countersunk Screw Hex Socket Steel Galvanizing Tuflok Blue Patch

The countersunk screw is commonly used in machine parts, die fixturing, and clamping. A countersink is a conical hole cut into a manufactured object, or the cutter used to cut such a hole. A common use is to allow 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 provides the custom made countersunk screw and customizable packaging.

Galvanization, or galvanisation, (or galvanizing as it is most commonly called in that industry), is the process of applying a protective zinc coating to steel or iron, to prevent the countersunk screw from rusting. The most common method is hot-dip galvanizing, in which parts are submerged in a bath of molten zinc. Galvanizing protects in three ways:
It forms a coating of zinc which, when intact, prevents corrosive substances from reaching the underlying steel or iron.
The zinc serves as a sacrificial anode so that even if the coating is scratched, the exposed steel will still be protected by the remaining zinc.
The zinc protects its base metal by corroding before iron. For better results, the application of chromates over zinc is also seen as an industrial trend.
Nylon patch is a pre-applied thread-locking coating (typically Nylon), which is fused to internal or external threads of a fastener. Nylon patch is dry to the touch and ready for use right out of the box. Unlike reactive thread lockers, the nylon patch performs immediately upon assembly with no curing time required. When assembled with a mating part, the nylon patch is compressed. The engineered plastic (typically a Nylon Patch) resists this compression and acts as a wedge, increasing the metal to metal contact 180° opposite the material. This mechanical force creates a strong, yet fully adjustable lock which will not weaken, even under extreme vibration. Nylon patch screw is commonly known as a prevailing torque type self-locking fastener.

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