Jam Nuts
The addition of the hex nut ensures that the bolt etc stays in place.
Jam nuts. A variety of these common fasteners can be used. Jam Nut Jam nuts are used as a second nut threaded over a bolt to prevent the first from loosening or in applications where there is not sufficient space for a standard nut. It is commonly used as a type of locknut where it is jammed up against a standard nut to lock the two in place.
Use with a screw or hex bolt to create a strong connection. There are a couple of different reasons you might want to use jam nuts. Jam Nuts are heavy profile hexagon head bolts with full or partial thread configurations.
It is tightened against the work surface with a standard hex nut tightened behind it to keep it firmly in place. Hex jam nuts from ITA Fasteners are thin nuts which have the same dimensions as the standard hex nut for the head alone. Closeouts CuttingAbrasives Drill Bits Electrical Fasteners Bolts Nuts Acorn Cap Nuts Allen Nuts Acme Nuts Anco Locknuts Castle Nuts Coupling Nuts.
Jam Nut - Heavy This style of nut refers to its superior design strength compared to other nuts of similar size and grade. Metric Fine-Thread 18-8 Stainless Steel Thin Hex Nuts. STEEL LOW CARBON ZINC PLATED.
Heavy hex jam nuts are thinner than a standard heavy hex nut but have. In practice these nuts are both screwed onto the bolt and then they are tightened against each other. They can be used to run up against a hex nut to lock the hex nut in place or as a leveling nut among other uses.
Made with fine-pitch threads vibration is less likely to loosen these metric nuts than those with coarse-pitch threads since the threads sit closer together. Jam nuts are used as a second nut threaded over a bolt to prevent the first from loosening or in applications where there is not sufficient space for a standard nut. Jam nuts are nuts that are about half of the size of a regular nut.