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Posted: 3/29/2004 3:36:44 AM EDT
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Im looking to screw together my first rifle. It seems like everyone is using button head type screws. Is there any reason not to use flat headed screws like these www.thread-rite.com/unbrako/flat.htm ? Im tossing around the idea of using these then filling in the sockets with some JB weld or somesuch prior to finishing. I think it would give a nice semi-permanent 'riveted' look. Am i missing something important here or would this work ok? |
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These look like countersunk screws, I don't think they would have enough bearing surface if used. They are normally used in a surface that has been countersunk, providing a flush surface appearance. A button head screw would have more bearing surface under the head. These look interesting. They even have a shoulder providing even more bearing surface than the traditional button head cap screws most of us have been using till now. www.thread-rite.com/unbrako/button.htm |
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The standard button heads from McMaster-Carr have a perfect radius on the bottom for the countersink. If you get 1/4" x 28, you can crank them down tight enough to push the receiver down into the countersink in the trunnions. You do have to enlarge the countersink slightly with a 3/4" bit, though. If I remember when I get home, I'll try to take a photo of the BIQ (bolt in question)  Disconnector |
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no way! conventional socket head caps screws can be used, low head socket cap screws can be used, button head socket cap screwscan be used, fillister head screws can be used, oval head screws can be used, machine screws in various head configurations can be used, but flat head (countersunk) screws cannot be used due to material thickness...or lack thereof. |
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