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[Amel Yacht Owners] Re: re caulking of stanchion base
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James Alton
Bill Kinney,
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Actually you may have done yourself a favour by using the slotted head style. While the hex and square drive heads are really convenient since slippage of the tool is reduced, in my experience the maximum torque that you can apply to the head is not nearly as great as with the slotted head in a screw material that is not hardened. I have driven probably upwards of 30,000 slotted bronze and stainless screws slotted screws and if the tool fits the head really well and the the screws are driven true, it is quite possible to twist the head right off of the screw if too much torque is applied, often without any damage to the slot in the head. 2 years ago, I drove 6000 square drive screws and I had to be quite careful to keep the torque down to prevent the square in the screw from beginning to yield. I never broke off a single head due to the torque limitation and had to throw out several hundred screws that were damaged. Future removal of those screws is very iffy IMO. I think that the square and perhaps the hex drives are more suitable in a material where the head can be hardened such as a deck screw made of carbon steel. I am not a fastener expert so just sharing my experiences but unless I can find a good reason to switch from the original slotted, I am going back with the original head installed by Amel. If anyone has any information showing that a head other than hex beats the maximum torque of a slotted head, please enlighten me. Best, James Alton SV Sueño Maramu #220
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James Alton
Sorry, there is an error in my last post. The last line should have read “hex cap”, not just hex. Apologies. James
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