To the two parts worked as a whole — they should be connected to. Where possible, use bonding, soldering or welding, but all these options are permanent fixtures. And here is the bolt to nut connection is universal: he is subject to any material, and if necessary disconnect them tight elements of the design — this fixture is easy to Unscrew. However, such a connection provides the necessary resistance only when the bonded parts are inactive; and in the event of impact, for example, vibration can fail because of such insidious phenomena as samothracian.
To avoid this, there are simple and affordable ways additional fixing of bolted connection.
Adhesive fixation. Before the bolt is screwed the nut, the whole threaded portion of the bolt, or a portion of it, which will be under the nut prior to Assembly apply any glue: the nut will stay “dead”
The method of deformation. It is used in the case where the bolt is already screwed nut. Then, to prevent its possible samothracian, chisel crumple a few turns of thread: through them the nut itself will not pass, if from the outside it will not be applied for that extra impact
Slit method. After screwing on the nut bolt one of its sides propisyvaetsya to thread a hacksaw — it turns out a crack in which you can get the glue and it will hold or through which the nut may be slightly deformed (crushed) that will not allow it to work loose
In the case of using the screw fastener prevents loosening its locking fixation is not a nut, since it is missing, and the screw head:
A,B — example of zakanchivaya screws through the holes in their head with wire twists; slotted fixing screws wire
1 — split washer (Grover); 2 — star washer with exposed beams; 3 — star washer with internal rays (their ends projecting beyond the plane rested in the nut and prevent its inversion); 4 — laying the rubber ring; 5 — castellated nut; 6 — lock nut
An example of using washers (Grover’s):
1 — the head of the bolt; 2 — washers, plain, flat; 3 — contractible parts, 4 — split washer-stopper; 5 — nut
The stopper can also serve the rubber seal that is embedded with the approach thread:
1 — nut; 2 — rubber ring.
Example dual nuts:
1 — the main nut; 2 — an ordinary flat washer; 3 — locknut; 4 — detail
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