21410
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45699091-21410
Titanium SHCS 4-40 x .625 Long
The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.
given in nominal sizes, not in the actual measurement.
A special design is cut into the head of the screw that the screwdriver will fit into when the screw is driven into a surface. This is called a drive. There are many different designs of drives.