Screw Size Control Table for Matching Use of Metric Hexagona
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Metric Spanner Specification
mm
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Screw specifications
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Inside hexagonal cylindrical head screw (cup head)
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Hexagonal countersunk head screw (flat cup)
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Internal hexagonal semicircular head screw (round cup)
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Internal hexagonal fastening screw (machine meter)
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Inside Hexagonal Cylindrical Head Shaft Shoulder Screw (Plug Strike)
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0.7
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M1.6
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0.9
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M2
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1.3
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M1.4
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M2.5, M2.6
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1.5
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M1.6, M2
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M3
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2
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M2.5
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M3
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M3
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M4
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2.5
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M3
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M4
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M4
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M5
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3
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M4
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M5
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M5
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M6
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M5
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4
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M5
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M6
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M6
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M8
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M6
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5
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M6
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M8
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M8
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M10
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M8
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6
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M8
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M10
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M10
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M12, M14
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M10
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8
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M10
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M12
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M12
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M16
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M12
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10
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M12
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M14, M16
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M14, M16
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M18, M20
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M16
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12
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M14
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M18, M20
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M18, M20
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M22, M24
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M20
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14
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M16, M18
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M22, M24
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M22, M24
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17
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M20
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