Push nut  
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Push nut (GMN)
Date of listing： 2013-11-29

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Push nut (GMN)


Structure and principle

The top nut assembly consists of round nuts and several top screws and a hard pad, which can be used directly to replace the traditional standard six angle nut. Screw it on the bolt, stud or threaded rod, shaft, the main screw bolt / stud nut placed on the hard flat pad. After the round nut is in place, the actual tightening of the bolt / stud will tighten the top screws around the main thread by the hand tool.

（1）Push nut (GMN)By tightening the jackbolts,a strong thrust(axial)force is generated.This thrust force is directed against a hardened washer.Jackbolts against a hardened washer.Jackbolts have a small

friction diameter and can therefore create a high thrust force with relatively little torqut input.

（2）The loads are transferred through the nut body which is postitioned on the main thread by hand.

（3）A hardened washer is used to transfer the force while protecting the flange face.

（4）The thrust(axial)force of many jackbolts and the opposite reaction force of the main bolt head create a strong clamping force on the flange.

（5）The thrust(axial)force from the jackbolt creates an equally

strong reaction force in the main bolt

Note: when removing the push nut, the push screw must be gradually loosened. If a single push screw is completely loosened, the other screws will be subjected to all loads, so that the push nut is difficult to disassemble or disassemble. Rust occurs before the demolition should be sprayed with infiltration oil, such as the expansion of long bolts more, need to do several times the following steps.

1.1 optional a push screw to mark, according to the clockwise direction of each push screw loosen 90 degrees, after completion of the marked push screw will appear tightening state, but the load has been reduced.

1.2 repeat step 1.1. for example the device uses 12 push nuts, the 12 push nut is also in accordance with the steps of the 1.1 operation.

1.3 repeat step 1.1

1.4 push screws after loosening, remove the push nut by hand.

 
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