Sus Hex Socket Head Cap Screws Ref Din912

Cup head screws pay attention to aspects:
1. Correct selection of products: Before use, confirm whether the mechanical properties of the product can meet the requirements of use, such as the tensile strength of the hexagon socket head screw and the load of the nut. The length of the hexagon socket head screw should be selected appropriately, with 1-2 pitch of the exposed nut after tightening.
Before use, check whether the thread is rough, whether there is iron filings or dirt between the threads, these things often lead to lock.
3. Lubrication treatment can be done for fasteners before use: it is recommended to use butter, molybdenum disulfide, mica, graphite or talcum powder for lubrication. At present, wax immersion treatment is commonly used for lubrication and anti-locking.
4. Use method of stainless steel cup head screw:
a. The speed and force of screwing in should be appropriate, not too large, choose torque wrench or socket wrench as much as possible, and avoid using adjustable wrench or electric wrench. Excessive speed * will cause the temperature to rise rapidly and cause lockup. Inlet pump valve.
B, the direction of the force, the nut must be perpendicular to the axis of the screw to screw in. hex cup head screw factory original share above.
5, the use of washers can effectively prevent the problem of locking too tight.
6, lock or bite often occurs in stainless steel, aluminum alloy and titanium alloy fasteners, these metal alloys themselves have anti-corrosion properties, will be damaged on the surface of the metal surface to produce a thin layer of oxide layer to prevent further corrosion. When the stainless steel fasteners are locked, the pressure and heat generated between the teeth will destroy the oxide layer, so that the metal threads between the blocking or shearing, and then the phenomenon of adhesion. When this phenomenon continues to occur, the stainless steel fasteners will lock up and can no longer be removed or locked.

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