Good luck with that. Even a craftsman socket is probably high 40s Rc. Cobalt M-42 min. Carbide better.I would drill it so it fits.
Take a dremel, razor knife or soldering iron to the peg instead?I just fell off my chair reading this post, I am having to drill out two holes to fill that stupid peg holder, those sockets are killing my drill bits left and right, **** happens.
Personally, I would just change the diameter of the peg.![]()
Just looked at my craftsman sockets. There is evidence of a drill operation on the hex side. The hole is just smaller than the inside (flats) of the hex so that the broach will clean up that surface.My guess is to help center a spark plug, 15/16 is one of the sizes for spark plugs if I remember correctly and the smaller hole might help with NOT breaking the ceramic




Many older vehicles used fatter spark plugs that used a 15/16" socket. There are special deep sockets with the small hole and foam lining to keep you from breaking the spark plug. This looks like a compromise to make a regular deep socket also work for spark plugs.My guess is to help center a spark plug, 15/16 is one of the sizes for spark plugs if I remember correctly and the smaller hole might help with NOT breaking the ceramic
I feel like the Hansen racks, with their annoying pegs that have caused GJers to look inside their sockets, (holes, paint, missing chrome) and their the sizes marked (socket skips) have SINGULARLY caused a lot of angst here.It's like that because it's not a critical feature and has no effect on the function of the socket. Yes, I know someone is now going to create a scenario where you need to pass a 2' long piece of threaded rod thru it for some reason....
You've probably had that socket for 15 years and just now noticed it because it won't fit on your Hansen pegs. If you have Ernst racks like I do, you still wouldn't have noticed it. BTW have some of those sockets also. And of course I've never looked at them either to see if the thru holes are all identical. Would it be better if it was consistent and the entire set was too small to fit on the racks? I get it, they should all be the same, but maybe that was made on a different day, or machine, or...
Good thoughts, but I have a couple c’man 15/16” and none of them look like that, I just see a square drive straight thru, like the pic above ( which isn’t a 15/16” I know, but it’s newer “laser etched” than my 1990s 6 and 12pts).Many older vehicles used fatter spark plugs that used a 15/16" socket. There are special deep sockets with the small hole and foam lining to keep you from breaking the spark plug. This looks like a compromise to make a regular deep socket also work for spark plugs.