Originally Posted by
Stickman
Sorry for the late reply, and I appreciate your clarification.
One of the easiest things I can tell you is that most screws I have seen as an instructor, and department armorer, as well as being involved in the weapon industry have been staked. The ones that come loose? They have been staked as well. Why do they come loose? Typically it is because the displaced material has not made solid enough contact with the lightly threaded section on the exterior of the screw head.
If all screws we are talking about are of the same material (giving the benefit of the doubt as per your question), and staked properly, the OCKS would still out perform them. This isn't something that we need science classes for, this is a matter of common sense. When I've seen well staked screws come loose many times, common sense tells me that allowing for material to be displaced deeper into the screw would create a more positive mechanical stop.
I'll happily point out that I have no way to state off the top of my head what the different shear factors would be, and what percentage the gain would be. However, I don't think there is anyone who would think less depth would be as good or better than more depth. The OCKS simply provides allowance for greater depth and holding power (again, that is making the assumption everything else is the same).
Lastly, screws are a commodity item for things that have low relative value. If not, there wouldn't be a milspec (or standard) stating what type of screws should be used. Manufacturers that cheap out on screws and use chinese low quality components, are building a commodity. The ones doing it right are building something different.
I hope this explains it in easy enough terms to understand. I get that not everyone has seem screws come loose to the point where they lock up a weapon, snap heads, create gas problems, or anything else. For a lot of people who only have one gun, are new to the platform, or just haven't seen issues, all of this is probably overthinking something which they really don't care about.