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Clock and Watch Key Conversion Chart
Large selection of Clock Keys and Watch Keys in stock!
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CLOCKS |
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WATCHES |
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U.S. / English |
Euro* |
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U.S. / English |
Euro* |
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Key Number |
Metric (mm) |
Inches (.000) |
Metric (mm) |
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Key Number |
Metric (mm) |
Inches (.000) |
Metric (mm) |
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00 |
2.2 |
0.087 |
2 |
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2 |
1.15 |
0.045 |
1.75 |
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0 |
2.4 |
0.094 |
2.25 |
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3 |
1.2 |
0.047 |
1.65 |
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1 |
2.6 |
0.102 |
2.5 |
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4 |
1.3 |
0.051 |
1.6 |
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2 |
2.8 |
0.11 |
2.75 |
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5 |
1.4 |
0.055 |
1.5 |
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3 |
3 |
0.118 |
3 |
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6 |
1.5 |
0.059 |
1.4 |
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4 |
3.2 |
0.126 |
3.25 |
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7 |
1.6 |
0.063 |
1.3 |
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5 |
3.4 |
0.134 |
3.5 |
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8 |
1.65 |
0.065 |
1.2 |
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6 |
3.6 |
0.142 |
3.75 |
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9 |
1.75 |
0.069 |
1.15 |
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7 |
3.8 |
0.15 |
4 |
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10 |
1.8 |
0.071 |
1.05 |
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8 |
4 |
0.158 |
4.25 |
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11 |
1.9 |
0.075 |
1 |
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9 |
4.2 |
0.165 |
4.5 |
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12 |
2 |
0.079 |
0.95 |
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10 |
4.4 |
0.173 |
4.75 |
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11 |
4.6 |
0.181 |
5 |
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12 |
4.8 |
0.189 |
5.25 |
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13 |
5 |
0.197 |
5.5 |
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14 |
5.2 |
0.205 |
5.75 |
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15 |
5.4 |
0.213 |
6 |
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16 |
5.6 |
0.22 |
6.25 |
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17 |
5.8 |
0.228 |
6.5 |
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18 |
6 |
0.236 |
6.75 |
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