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Wrench Size And Conversion Table

This table is the chart for publication of information of wrench sizes in inches (US) and millimeters (metric), as well as British spanner size information.

Inches Millimeters Spanner
0.250  1/4 AF 
0.276  7mm  7mm 
0.313  5/16 AF 
0.315  8mm  8mm 
0.344  11/32 AF; 1/8 Wworth 
0.354  9mm  9mm 
0.375  3/8 AF 
0.394  10mm  10mm 
0.433  11mm  11mm 
0.438  7/16 AF 
0.445  3/16 Wworth; 1/4 
0.472  12mm  12mm 
0.500  1/2 AF 
0.512  13mm 
0.525  1/4 Wworth; 5/16 BSF 
0.551  14mm 
0.563  9/16 AF 
0.591  15mm 
0.600  5/16 Wworth; 3/8 BSF 
0.625  5/8 AF 
0.630  16mm  16mm 
0.669  17mm  17mm 
0.686  11/16 AF 
0.709  18mm  18mm 
0.710  3/8 Wworth; 7/16 BSF 
0.748  19mm  19mm 
0.750  3/4 AF 
0.787  20mm  20mm 
0.813  13/16 AF 
0.820  7/16 Wworth; 1/2 BSF 
0.826  21mm  21mm 
0.866  22mm  22mm 
0.875  7/8 AF 
0.905  23mm  23mm 
0.920  1/2 Wworth; 9/16 BSF 
0.938  15/16 AF 
0.945  24mm  24mm 
0.984  25mm  25mm 
1.000  1in AF 
1.010  9/16 Wworth; 5/8 BSF 
1.024  26mm 26mm 
1.063  27mm  1 1/16 AF; 27mm 
1.100  5/16 Wworth; 11/16 BSF 
1.125  1 1/8 AF 
1.181  30mm  30mm 
1.200  11/16 Wworth; 3/4 BSF 
1.250  1 1/4 AF 
1.260  32mm  32mm 
1.300  3/4 Wworth; 7/8 BSF 
1.313  1 5/16 AF 
1.390  13/16 Wworth; 15/16 BSF 
1.417  36mm  36mm 
1.418  1 7/16 AF 
1.480  7/8 Wworth; 1in BSF 
1.500  1 1/2 AF 
1.575  40mm  15/16 AF; 40mm exactly 
1.614  41mm  41mm 
1.625  1 5/8 AF 
1.670  1 in Wworth; 1 1/8 BSF 
1.688  1 11/16 AF 
1.811  46mm  46mm 
1.813  1 13/16 AF 
1.860  1 1/8 Wworth; 1 1/4 BSF 
1.875  1 7/8 AF 
1.969  50mm  50mm 
2.000  2in AF 
2.050  1 1/4 Wworth; 1 3/8 BSF 
2.165  55mm  55mm 
2.362  60mm  60mm 
Updated 8.12.11


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