from i Saluti, May 1997
Use of SAE Wrenches On Metric Fasteners
Information is from International Auto Parts' website <http://www.international-auto.com>
Metric US size Comments US/Metric ratio
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7mm 5/16" Extremely loose 113%
8mm 5/16" Tight 99%
9mm 11/32" Too tight unless head is damaged 97%
10mm 7/16" Extremely loose 111%
11mm 7/16" Very good 101%
12mm 1/2" Very loose 106%
13mm 1/2" Too tight unless head is damaged 98%
14mm 9/16" Loose 102%
15mm 19/32" Very good 101%
17mm 11/16" Loose 103%
19mm 3/4" Perfect 100%
22mm 7/8" Slightly loose 101%
25mm 1" Loose 102%
27mm 1-1/16" Perfect 100%
30mm 1-3/16" Slightly loose 101%
32mm 1-1/4" Tight 99%
36mm 1-7/16" Slightly loose 101%
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