ASME B18.6.7m Slotted Cross And Square Recessed Flat Countersunk Head Machine Screws

Nominal Screw Size and Thread Pitch	Slotted and Style A			Style B				D_K			K	R		N		T
	D_S		D_SH^a		Ds	L_SH^a		Head Diameter			Head Heigh	Underhead Fillet Radius		Slot Width		Slot Depth
	Body Diameter		Body and Shoulder Diameter	Shoulder Diameter	Body Diameter	Shoulder Length		Theoretical Sharp		Actual	Head Heigh	Underhead Fillet Radius		Slot Width		Slot Depth
	Max	Min	Max	Min	Min	Max	Min	Max	Min	Min	Max Ref	Max	Min	Max	Min	Max	Min
ASME B18.6.7M - M2 × 0.4 b	2	1.65	2	1.86	1.65	0.5	0.3	4.4	4.1	3.5	1.2	0.8	0.4	0.7	0.5	0.6	0.4
ASME B18.6.7M - M2.5 × 0.45	2.5	2.12	2.5	2.36	2.12	0.55	0.35	5.5	5.1	4.4	1.5	1	0.5	0.8	0.6	0.7	0.5
ASME B18.6.7M - M3 × 0.5	3	2.58	3	2.86	2.58	0.6	0.4	6.3	5.9	5.2	1.7	1.2	0.6	1	0.8	0.9	0.6
ASME B18.6.7M - M3.5 × 0.6	3.5	3	3.5	3.32	3	0.7	0.5	8.2	7.7	6.9	2.3	1.4	0.7	1.2	1	1.2	0.9
ASME B18.6.7M - M4 × 0.7	4	3.43	4	3.82	3.43	0.8	0.6	9.4	8.9	8	2.7	1.6	0.8	1.5	1.2	1.3	1
ASME B18.6.7M - M5 × 0.8	5	4.36	5	4.82	4.36	0.9	0.7	10.4	9.8	8.9	2.7	2	1	1.5	1.2	1.4	1.1
ASME B18.6.7M - M6 × 1	6	5.21	6	5.82	5.21	1.1	0.9	12.6	11.9	10.9	3.3	2.4	1.2	1.9	1.6	1.6	1.2
ASME B18.6.7M - M8 × 1.25	8	7.04	8	7.78	7.04	1.4	1.1	17.3	16.5	15.4	4.6	3.2	1.6	2.3	2	2.3	1.8
ASME B18.6.7M - M10 × 1.5	10	8.86	10	9.78	8.86	1.7	1.3	20	19.2	17.8	5	4	2	2.8	2.5	2.6	2
a All recessed head heat-treated steel screws of property class 9.8 or higher strength have the Style B head form. Recessed head screws other than those specifically designated to be Style B have the Style A head form. The underhead shoulder on the Style B head form is mandatory and all other head dimensions are common to both the Style A and Style B head forms. b This size is not specified for Type III square recessed flat countersunk heads; Type II cross recess is not specified for any size. All dimensions in millimeters For dimension B, see Table 1. For dimension L, see Table 7.