ASME B18.2.3.4m Hex Flange Screws

Nominal Screw Dia., D, and Thread Pitch	Body Dia., D_s		Width Across Flats, S		Width Across Corners, E		Flange Dia., D_c	Bearing Circle Dia., Dw	Flange Edge Thickness, C	Head Height, K	Wrenching Height, K1	Fillet Radius, R
Nominal Screw Dia., D, and Thread Pitch	Max	Min	Max	Min	Max	Min	Max	Min	Min	Max	Min	Max
ANSI B18.2.3.4M - M5 × 0.8	5	4.82	7	6.64	8.08	7.44	11.4	9.4	1	5.6	2.3	0.3
ANSI B18.2.3.4M - M6 × 1	6	5.82	8	7.64	9.24	8.56	13.6	11.6	1.1	6.8	2.9	0.4
ANSI B18.2.3.4M - M8 × 1.25	8	7.78	10	9.64	11.55	10.8	17	14.9	1.2	8.5	3.8	0.5
ANSI B18.2.3.4M - M10 × 1.5	10	9.78	13	12.57	15.01	14.08	20.8	18.7	1.5	9.7	4.3	0.6
ANSI B18.2.3.4M - M12 × 1.75	12	11.73	15	14.57	17.32	16.32	24.7	22	1.8	11.9	5.4	0.7
ANSI B18.2.3.4M - M14 × 2	14	13.73	18	17.57	20.78	19.68	28.6	25.9	2.1	12.9	5.6	0.8
ANSI B18.2.3.4M - M16 × 2	16	15.73	21	20.48	24.25	22.94	32.8	30.1	2.4	15.1	6.7	1
All dimensions are in millimeters. Basic thread lengths, B, are the same as given in. Transition thread length, x, includes the length of incomplete threads and tolerances on grip gaging length and body length. This dimension is intended for calculation purposes only. For additional manufacturing and acceptance specifications, reference should be made to ASME B18.2.3.4M-1984 standard.