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Carnage
Oct 29, 2008, 5:20 PM
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Registered: Mar 27, 2007
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we needed more bolts and my boss accidentally ordered the ones with the angled heads instead of the square heads (the ones that use the small wrench not the big wrench). some of em are pretty big and have section that dont have threading. so on the square headed one this makes sense, but i cant for the life of me figure out why there would be any use of the angled heads on larger holds. the only time i use them is on foot jibs. so am i not seeing something here? are there holds out there that use the angled heads that are big, or is there a way to use the angled heads on the larger holds?
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acorneau
Oct 29, 2008, 5:29 PM
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Carnage wrote: so am i not seeing something here? are there holds out there that use the angled heads that are big, or is there a way to use the angled heads on the larger holds? Yes, there are larger holds that use Martini's. However, DON'T use a Martini on a cap-head hold or you'll mess up the washer insert. Also, these bolts weren't originally designed for hand holds, they've been around longer than that.
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spikeddem
Nov 2, 2008, 1:03 AM
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If the hold has metal in the plastic, use the big wrench bolts, if it has no metal, use the small wrench bolts.
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gunkiemike
Nov 2, 2008, 9:00 PM
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spikeddem wrote: If the hold has metal in the plastic, use the big wrench bolts, if it has no metal, use the small wrench bolts. I dunno. I've split a hold or two (that didn't have a washer IIRC) due to the wedging action of those taper-head bolts. Now I'm careful to match bolt head to seat shape.
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fatoomchk
Nov 3, 2008, 1:58 PM
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Registered: May 18, 2007
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argh. no wonder he ordered the wrong screws... This is called a "standard head" socket cap screw. This is called a "flat head" socket cap screw in the USA, and in other markets a "counter-sunk" socket head cap screw. If you are worried about ordering screws, then get them from www.mcmaster.com They are expensive, but they have very nice pictures of the screws, and even technical drawings if you want to be really sure. Tell your boss so he doesn't "screw"-up again. (mwahahahahahaha) and yes, it is real easy to break a hold without a washer if you use a flat head screw.
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fatoomchk
Nov 4, 2008, 8:58 AM
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Registered: May 18, 2007
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djlachelt wrote: It is also referred to as a "Martini" bolt. yeah... but that's a regional colloquialism. If you ask for a martini bolt in a lot of places you will get a strange look and a long wait. I just mentioned the generally accepted names to help the OP
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ctardi
Nov 6, 2008, 7:12 PM
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Bringing in, sending in, or emailing a photo of what you want can also help.
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spikeddem
Nov 7, 2008, 12:55 AM
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gunkiemike wrote: spikeddem wrote: If the hold has metal in the plastic, use the big wrench bolts, if it has no metal, use the small wrench bolts. I dunno. I've split a hold or two (that didn't have a washer IIRC) due to the wedging action of those taper-head bolts. Now I'm careful to match bolt head to seat shape. I'm pretty sure what I said is correct. I think button-headed bolts can be used on anything . . . not that anyone asked.
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