Metric Din 551,553,438

Diameter	Slot width	Slot depth	Point diameter
			Din 438  cup pt	Din 551 flat pt	Din 553 cone pt
M1.6	0.25	0.56	*	0.8	0.16
M2	0.25	0.64	*	1.0	0.2
M2.5	0.4	0.72	1.2	1.5	0.25
M3	0.4	0.80	1.4	2.0	0.3
M4	0.6	1.12	2.0	2.5	0.4
M5	0.8	1.28	2.5	3.5	0.5
M6	1.0	1.6	3.0	4.0	1.5

Imperial dimensions on request

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This information is for guidance only no liability can result from its use