Flat Countersunk Head Shape and Dimensions = Standard JIS

Technical Data

Screw diameter Machine screw Thread Pitch No. of Phillips recess a Head Diameter size a Tolerance b Head Thickness size b Tolerance
M2 0.4 1 4 + 0 - 0.4 1.2 + / - 0.2
( M2.2 ) 0.45 1 4.4 + 0 - 0.4 1.3 + / - 0.2
( M2.3 ) 0.45 1 4.6 + 0 - 0.4 1.35 + / - 0.2
M2.5 0.45 1 5 + 0 - 0.4 1.45 + / - 0.2
( M2.6 ) 0.45 1 5.2 + 0 - 0.4 1.65 + / - 0.2
M3 0.5 2 6 + 0 - 0.5 1.75 + / - 0.3
( M3.5 ) 0.6 2 7 + 0 - 0.5 2 + / - 0.3
M4 0.7 2 8 + 0 - 0.5 2.3 + / - 0.3
M5 0.8 2 10 + 0 - 0.6 2.8 + / - 0.3
M6 1.0 3 12 + 0 - 0.7 3.4 + / - 0.4
M8 1.25 3 16 + 0 - 0.8 4.4 + / - 0.4

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