Most grain bin bolts have either a rubber coated head or a rubber washer to seal the hole against water getting into the bin. I usually DO NOT reused them because the seals usually are not good on the old ones. On the last few bins I have setup I used the Brock covered bolts. (picture) I like that they will never rust. Some of my older bins have rust stains down the sides from the bolts rusting.
New regular bin bolts are about $.10-.12 each with the nut. IF your bolts look good then you can buy the seal washers for around $.04 each. You have the labor/time taking the old ones off and installing the new ones. The coated bolts are around $.20 each.
The first two bins I moved I used the old bolts over and used silicone caulk under the old seals. What a PAIN to do. I also later had to remove one sheet from one of those bins and the caulk was in the nut. So basically the nuts would not come out easy. They acted like lock nuts and turned hard the entire bolt length. So what ever you do I would recommend NOT using sealer under the bolt heads.
I have also started using rolled caulk at the bin sheet joints, ends and top/bottom. This makes the seam more weather tight. Moisture is the enemy of stored grain. It will wick in places you never think it will until you go to empty a bin and have 3-4 inches of rotten grain along the side seams.
I buy most of these type of products off a local bin installer/seller. The freight makes online stuff higher. Plus you do not know the quality of the products.
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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