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| Black oiled
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Term associated with pipe surface whereby material ordered in this manner is protected with a varnish-type oil on the O.D. for temporary corrosion protection during transit and in short-term storage. |
| Black pipe
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Lacquer-finish cast iron pipe. |
| Black spot
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A disease on the foliage of roses. It is caused by moisture. To avoid, plant disease. |
| Black walnut
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Hard brown wood normally used for making furniture. |
| Blackbody
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An ideal substance that absorbs all radiation falling on it, and reflecting nothing. |
| Blacksmith hammer
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Blacksmith hammers are usually made with a 2-1/2 lb. Drop-forged steel head mounted on a 15 inch handle. These features help make it the recommended tool for bending and forming heated metals, as well as driving timbers and spikes. |
| Blackwater
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Wastewater from toilets or latrines and sinks used for food preparation or disposal, or for the disposal of chemicals. |
| Blade
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(1) The cutting part of a tool, instrument or weapon. (2) The expanded part of a leaf or petal. |
| Blade and combination
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Combination square that has an attached center head which is able to slide along the blade of the square. |
| Blade guard
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Usually hard plastic, this shield covers the saw blade and helps prevent unwanted objects from coming in contact with the spinning saw blade. |
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