I am just fooling around right now for my own curiosity, but have a question about the S&G 8400 spline keys.
My 8410 and accessories are new, and I am a bit surprised that the spline key is merely finger snug. That is, I can push it down all the way (between the threaded rod and the cam) easily with my fingers. There is a barely perceptible slop, just guessing maybe a quarter of a tick either way.
This is quite different from my first practice lock, a used 8500 series (I believe) lock, and I had to tap the spline key with a small hammer to get it in. I say I think it is an 8500 series lock because it does not have a model number, just "manipulation proof", but the inertial bar that pulls the fence looks and operates exactly like the one in the 8500 docs.
I do not have the installation instructions for this lock, as S&G apparently thinks that it must be absurdly obvious, as the factory packaged unit only includes a one-page usage sheet, and they do not have the 8400 installation PDF on their web site, either.
So is this rather loose fit normal for the 8400 series? I don't think so, but then again the 8400 has a unique spline key, and maybe some slop is intentional. (I think it is obvious that the flag has to point outwards though, as the inner rod would have no clearance otherwise.)
If this is not normal, should I bend the spline key slightly to give it a tight fit, or would you recommend Locktite, or something else?
Also, S&G recommends that the spline key be replaced each time it is removed, and I won't squawk too much at a buck and a half each. But their minimum order of 50 is many times a lifetime supply for someone like me. Is there some other way to get these in reasonable quantities?
Many thanks for the information!