In a message dated 11/28/04 4:54:17 AM, THX0001 writes: << In a pinch, there may be sufficient length in the deeper, partially tapped/untapped portion of the original tapping to complete the tapping with a plug tap and thereby provide enough threads for a bolt up. The rule of thumb is that a tapped thread length of one and one half times the fastener diameter will provide sufficient pull out resistance to the maximum torque rating of that fastener. >> As hard as it is to believe, I made a mistake in the above paragraph. The phrase "plug tap" should read "BLIND tap". George |
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