Posted by MarkB_MI on January 13, 2008 at 16:43:16 from (198.208.251.23):
In Reply to: Darned lag bolts posted by Dave from MN on January 13, 2008 at 10:38:46:
I've run into the same problem. I was attaching brackets to treated yellow pine with 1/4 inch lags. They would go in OK with a pilot hole, but if you had to loosen them up they would twist off. I suppose the pitch in the pine was acting as glue. These imported fasteners are by and large garbage.
What I have started using are called "construction screws". Sorry, I can't check the brand because I'm out of the country this week. A couple of the local hardware stores carry them, but you certainly can't get them at Home Depot. These screws come in sizes 3/16, 1/4 inch and up, with lengths up to eight inches or so. They are very strong. They have a self-drilling point, a short threaded portion and a smooth shank. The heads are either flat or a large dome. They always use Torx drivers. These screws are much more expensive than lags, but they do not twist off.
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Today's Featured Article - Fasteners: The Nuts and Bolts of Nuts and Bolts - by Curtis Von Fange. The nuts and bolts of nuts and bolts is an interesting and essential piece of knowledge that applies to our older tractors. An improperly torqued capscrew on an engine head or a shear bolt that is too hard on the driving shaft of a bushog can create havoc and make an expensive and uncalled for repair. Let�s examine the purpose and design of these fasteners in order to ensure their proper use. Fasteners are probably one of the aspects of mechanics that is given the least amount of thought.
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