ASME B18.2.5M Metric 12-Point Flange Head Screws

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Nominal Screw Diameter and Thread Pitch	Body Diameter, Ds		Width Across Flats, S			Minimum Width Across Corners, E	Flange Diameter, Dc		Minimum Bearing Circle Diameter, Dw	Flange Edge Thickness, C		Head Height, K		Minimum Wrenching Height Ref, Kw	Maximum Flange Top Fillet Radius, R2	Maximum Head Drive Root Radius, R4
Nominal Screw Diameter and Thread Pitch	Max.	Min.	Nom.	Max.	Min.	Minimum Width Across Corners, E	Max.	Min.	Minimum Bearing Circle Diameter, Dw	Max.	Min.	Max.	Min.	Minimum Wrenching Height Ref, Kw	Maximum Flange Top Fillet Radius, R2	Maximum Head Drive Root Radius, R4
M5 X 0.8	5	4.82	5	5	4.79	5.6	8.72	8.27	8.03	2.25	2	5	4.88	2.63	0.5	0.3
M6 X 1.0	6	5.82	6	6	5.79	6.7	10.22	9.77	9.38	2.7	2.45	6	5.82	3.12	0.5	0.4
M8 X 1.25	8	7.78	8	8	7.78	9	13.27	12.72	12.33	3.6	3.35	8	7.78	4.18	0.5	0.4
M10 X 1.5	10	9.78	10	10	9.78	11.2	16.27	15.69	15.33	4.5	4.13	10	9.78	5.28	0.5	0.5
M12 X 1.75	12	11.73	12	12	11.79	13.5	18.27	17.67	17.23	5.4	5.03	12	11.73	6.33	0.5	0.5
M14 X 2	14	13.73	14	14	13.79	15.8	21.33	20.67	20.17	6.3	5.93	14	13.73	7.43	0.5	0.7
M16 X 2	16	15.73	16	16	15.81	18	24.33	23.62	23.17	7.2	6.83	16	15.73	8.53	0.5	0.7
M20 X 2.5	20	19.67	20	20	19.82	22.5	30.33	29.55	28.87	9	8.5	20	19.67	10.67	0.5	0.8
M24 X 3	24	23.67	24	24	23.75	27	36.39	35.52	34.81	10.8	10.3	24	23.67	12.87	0.5	0.8
M30 X 3.5	30	29.67	30	30	29.72	33.8	45.39	44.52	43.61	13.5	13	30	29.67	16.17	0.5	1
M36 X	36	35.61	36	36	35.7	40.5	54.46	52.75	52.54	16.2	15.6	36	35.57	19.37	0.5	1.3

This Website describes DIN standard Fastener in China.Wenzhou Nanlong Import & Export Trading CO.,LTD.(China)-There are ASME B18.2.5M Metric 12-Point Flange Head Screws.And the the material are stainless steel (TP304-18-8,316,316L,310S.309S..317L.347H,904L...),carbon steel (C1018 C1022),aluminium,brass, titanium & titanium alloy(Ti G1,Gr2,G4,Gr5,G7) and so no.