Spanner size comparison

Jaw gap (in) Spanner size Jaw gap (in) Spanner size
0.250 1/4 in AF 0.686 11/16 in AF
0.276 7 mm 0.709 18 mm
0.313 5/16 in AF 0.710 3/8 in Whitworth; 7/16 in BSF
0.315 8 mm 0.748 19 mm
0.344 11/32 in AF; 1/8 in Whitworth 0.750 3/4 in AF
0.354 9 mm 0.813 13/16 in AF
0.375 3/8 in AF 0.820 7/16 in Whitworth; 1/2 in BSF
0.394 10 mm 0.866 22 mm
0.433 11 mm 0.875 7/8 in AF
0.438 7/16 in AF 0.920 1/2 in Whitworth; 9/16 in BSF
0.445 3/16 in Whitworth; 1/4 in BSF 0.938 15/16 in AF
0.472 12 mm 0.945 24 mm
0.500 1/2 in AF 1.000 1 in AF
0.512 13 mm 1.010 9/16 in Whithworth; 5/8 in BSF
0.525 1/4 in Withworth; 5/16 in BSF 1.024 26 mm
0.551 14 mm 1.063 27 mm; 1 1/16 in AF
0.563 9/16 in AF 1.100 5/16 in Withworth; 11/16 in BSF
0.591 15 mm 1.125 1 1/8 in AF
0600 5/16 in Whitworth; 3/8 in BSF 1.181 30 mm
0.625 5/8 in AF 1.200 11/16 in Withworth; 3/4 in BSF
0.630 16 mm 1.250 1 1/4 in AF
0.669 17 mm 1.260 32 mm

The history of BMW

1927