ASME B18.6.3 Recess 100-deg Flat Countersunk Head Screws

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ASME B18.6.3 Recess 100-deg Flat Countersunk Head Screws (Machine Screws Only)

Nominal Size or Basic Screw Diameter		Recess Dia., M,Ref.	Driver Size	Recess Penetration Gaging Depth, P		Recess Dia., M,Ref.	Driver Size	Recess Penetration Gaging Depth, P
Nominal Size or Basic Screw Diameter		Recess Dia., M,Ref.	Driver Size	Max.	Min.	Recess Dia., M,Ref.	Driver Size	Max.	Min.
0	0.0600	0.054	0	0.028	0.012	0.054	0	0.029	0.013
1	0.0730	0.062	0	0.036	0.02	0.062	0	0.037	0.021
2	0.0860	0.088	1	0.049	0.033	0.088	1	0.046	0.030
3	0.0990	0.096	1	0.056	0.04	0.096	1	0.053	0.037
4	0.1120	0.110	1	0.071	0.055	0.110	1	0.068	0.052
6	0.1380	0.148	2	0.075	0.052	0.148	2	0.071	0.053
8	0.1640	0.162	2	0.09	0.067	0.162	2	0.086	0.068
10	0.1900	0.178	2	0.105	0.082	0.178	2	0.101	0.083
1/4	0.2500	0.240	3	0.118	0.095	0.240	3	0.114	0.096
5/16	0.3125	0.310	4	0.148	0.126	0.310	4	0.145	0.127
3/8	0.3750	0.336	4	0.173	0.151	0.336	4	0.170	0.152

This Website describes DIN standard Fastener in China.Wenzhou Nanlong Import & Export Trading CO.,LTD.(China)-There are ASME B18.6.3 Recess 100-deg Flat Countersunk 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.