Causes And Solutions Of Locking Stainless Steel Security Nut Bolt Fasteners

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Stainless steel Security Nut Bolt Fasteners are usually used for fastening expensive machine parts because of their beauty, durability and corrosion resistance. But in daily use we often encounter the problem of stainless steel Security Nut Bolt Fasteners being locked, why is this?

Metal Security Nut Bolt Fasteners in fasteners often rust due to various reasons. When rust occurs, some fasteners will be completely locked, resulting in the loss of operation efficiency of the fasteners themselves, that is, fasteners cannot be disassembled or locked. Complete locking of fasteners can occur in as little as a few seconds.

JINGBANG, as a professional fastener manufacturer, today will share with you some advice to make the probability of a fastener lock to a minimum!

Why do stainless steel Security Nut Bolt Fasteners lock up?
Not choosing the right fastener product. Before use, it should be confirmed whether the mechanical properties of the product can meet the use requirements. In addition, the length of the screw should be appropriate to tighten the screw to expose one to two teeth to prevail.
Rough teeth or foreign bodies. If there are solder joints and other metal chips caught between the teeth, often leads to a lock.
Pushing too hard or locking too fast. Use torque wrenches or socket wrenches whenever possible. Avoid adjustable wrenches or electric wrenches, because electric wrenches often lead to too fast locking speed, rapid temperature rise, and lock.
The Angle of force application direction is wrong. Screw the nut perpendicular to the axis of the screw, do not tilt.
Flat and spring washers are not used. The use of gaskets can effectively prevent the problem of over-locking.
Preventive measures and methods to avoid locking of stainless steel fasteners.
Correct selection of fastener products: before use, confirm whether the mechanical properties of products can meet the user’s needs, such as the tensile strength of screws and the guaranteed load of nuts. The length of the screw should be selected properly, with a 1-2 teeth distance of the nut exposed after tightening.
Before use, check whether the thread of the fastener is rough and whether there are iron filings or dirt between the threads because these things often lead to locking.
Before use, the fastener can be lubricated spa: it is recommended to use butter, molybdenum disulfide, mica, graphite, or talcum powder to do lubrication. At present, wax dipping treatment is commonly used to do lubrication and anti-locking.
Pay attention to the method of using a fastener. On the one hand, the speed and force of screwing should be appropriate, not too fast or too large. Torque wrench or socket wrench should be selected as far as possible, and an adjustable wrench or electric wrench should be avoided. Too fast will cause the temperature to rise rapidly and cause the lock. On the other hand, in the direction of force application, the nut must be screwed perpendicular to the axis of the screw.
The use of gaskets can effectively prevent the problem of locking too tight.
Locking or biting often occurs in fasteners of stainless steel, aluminum alloy and titanium alloy materials. These metal alloys are corrosion-resistant. When the surface is damaged, a thin oxide layer is created on the metal surface to prevent further corrosion. When the stainless steel fasteners are locked, the pressure and heat generated between the teeth will destroy this oxide layer, making the metal threads blocked or shear, and then occur adhesion phenomenon. When this phenomenon continues to occur, the stainless steel fasteners will be completely locked, and can no longer be removed or locked. Usually, this series of blocking-shear-adhesive-locking actions in a few seconds, so the correct understanding of the use of this type of fastener, can prevent this phenomenon.

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