No thread and a slightly rounded edge around the coutersink
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September 11, 2007 at 8:43 pm and is filed under Defect - Shaft, Drive - Slotted, Head - Countersink, Material - Brass, Screw Length - 2 1/4", Screw Size - 8. You can follow any responses to this entry through the RSS 2.0 feed.
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October 26, 2007 at 4:07 pm
That’s “countersink” with two ens.