Annular ring shank (ring shank nail) A term used to define a nail that has annular rings around the shank that hold the nail in place when driven into wood.
Anode (in water heater) A anode is a sacrificial metal rod placed in a water heater that will selectively corrode due to dissimilar metal electrolytic corrosion.
Askew A line or plank installed so that it is not aligned with other objects of similar nature. The line or plank is said to be askew.
ASTM Abbreviation for American Society for Testing and Materials. The society establishes the acceptable range of product usefulness based on tests.
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