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Some data points for look 171 when he gets off his a** and measures some things !
I measured a lot of my Snap-on tools. 6 Point sockets in the size range discussed averaged between .20 - .35 mm larger than the number on the tool. That makes a 14mm socket 14.20 - 14.35mm between the flats.
The size variance is directly related to the amount of use i have subjected them to. A size that was rarely used consistently was about .20 mm larger than it's labeled size and the heavily used ones were consistently .32-.35mm larger than labeled size.
I have never had any of these slip on a good fastener regardless of their wear.
Randomly, i have a first gen 4Runner in the shop now and i measured 14mm Toyota bolt heads at 13.95mm across the flats. No problems removing those with my 14.27mm 6 point Snap-on socket.
-Lorin
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