New Wheels
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Joined: Aug 2005
Posts: 2,760
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From: Gadsden Purchase
Some metric and standard wrenches can work on either for example:
{7/32" = 5.5mm}
{15/64" = 6mm}
{9/32" = ~7mm}
5/16" - 8mm
7/16" - 11mm (11.11mm ...the 11mm flare-nut wrench works better IME;}
1/2" - 13mm {12.7mm}
9/16" - 14mm {14.3mm}
{19/32" = 15.1mm, 19/32" is a useful size if you find one :}
5/8" - 16mm
11/16" - 17mm {17.5mm, so it's a "hammer" fit on a 18mm}
3/4" - 19mm
{25/32" = 20mm, never found a use for yet! :}
13/16" - 21mm {20.6mm, not so good}
7/8" - 22mm {22.25mm}
I may have missed some.
{7/32" = 5.5mm}
{15/64" = 6mm}
{9/32" = ~7mm}
5/16" - 8mm
7/16" - 11mm (11.11mm ...the 11mm flare-nut wrench works better IME;}
1/2" - 13mm {12.7mm}
9/16" - 14mm {14.3mm}
{19/32" = 15.1mm, 19/32" is a useful size if you find one :}
5/8" - 16mm
11/16" - 17mm {17.5mm, so it's a "hammer" fit on a 18mm}
3/4" - 19mm
{25/32" = 20mm, never found a use for yet! :}
13/16" - 21mm {20.6mm, not so good}
7/8" - 22mm {22.25mm}
I may have missed some.
1" = 25.4mm (only good for odd ball stuff anyway?)
1+1/16" = ~27mm
1+1/8" = 28.6mm (28mm is better for 28mm)
1+3/16" = ~30mm (bicycles :)
1+1/4" = ~32mm (inside the older VW transmissions)
1+5/16" = 33+1/3mm (my PS pitman arm nut is 1+5/16")
1+3/8" = ~35mm (only found it on plumbing parts so far:)
1+7/16" = 36.5mm (VW bug axle nut is 36mm)
1+1/2" = 38mm (trailer ball nut, buy a new ball if yours ain't 1+1/2";)
1+5/8" = 41.25mm
1+11/16" = ~43mm (sold my 1+11/16", my 1+3/4" or 1+5/8" covered it)
1+3/4" = 44.5mm (the larger track nuts)
1+13/16" = 46mm (VW bus axle nut)
3/4" bolts can have nuts that are 1+1/16" to 1+3/16" depending on
the age etc. Working on old railroad stuff was cool that way. :)
An 18mm boxed end will fit real nice on the 5/8" square of the T18 plugs.
A 7mm boxed end fit real nice on the 1/4" square A/C service valves but
over the years it quit working (soft steel) and now use large ViseGrips.
Alvin in AZ
ps- see any mistakes? :)
pps- There is just no real good replacement for...
9mm 10mm 12mm wrenches or a 7mm nut-driver
...depending on what you are working on.
Elder User
Joined: May 2008
Posts: 672
Likes: 0
From: near Liverpool, England
I've had some metric tools ever since I had a 1972 Ford Courier about 10 or so years ago, it even said "Kyamutsi Motor Co. , Japan" under the hood on the inside the engine compartment fender lining , heh,heh,heh......so brand and age don't always matter 
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