Are they rusty? Sometimes that can throw size off. I have to force/pound socket on sometimes. I also have a set of special sockets for under size bolt heads that have rusted down or rounded off. Another problem that comes up is tight clearance around bolt head that requires thin wall socket.I usually grind down a cheapee for that situation. Also bolt head can be to short and most sockets have chambered ends which makes them slip off so I grind down the socket end to get rid of ridge.
The size is 15mm here is a diagram to help (Below) Please let us know if you need anything else to get the problem fixed.
Cheers
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Wednesday, December 14th, 2011 AT 3:43 PM