7 C.F.R. § 51.2660

Metric conversion table

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InchesMillimeters (mm)
8⁄64 equals3.2
16⁄64 equals6.4
24⁄64 equals9.5
32⁄64 equals12.7
40⁄64 equals15.9
48⁄64 equals19.1
51⁄64 equals20.2
52⁄64 equals20.6
54⁄64 equals21.4
56⁄64 equals22.2
1 equals25.4
18⁄64 equals28.6
116⁄64 equals31.8
124⁄64 equals34.9