A nylon insert lock nut is hex shaped, internally threaded with a nylon insert. The nylon material prevents loosening from vibration and cross threads to stop the nut from backing off of the fastener. The insert deforms elastically over the threads of the screw, but threads are not cut into the nylon. The nylon insert locks the nut in two ways. First, it forces the bottom face of the screw threads against the top face of the nut threads, increasing the friction between the two. Second, the nylon applies a compressive force against the screw itself.
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The term depreciation applies only to tangible long-term assets, other than land and natural resources.
Land is not depreciable, because it does not have a limited useful life.
The allocation of the cost of natural resources, such as oil, gas, and timber, to the periods they benefit is referred to as depletion. Natural resources are said to be depleted, not depreciated. Depletion expenses are recorded into [...]
1. extinct small freshwater jawless fish usually having a heterocercal tail and an armored head; of the Silurian and Devonian
Familiarity: ANASPID used as a noun is very rare.
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