Table 7. American National Standard Metric Heavy Hex Flange Screws ANSI/ASME B18.2.3.9M-2001 (R2014)
Indentation and Configuration Optional
C
K
L
1.5° Max. Contour optional
L g
B
K 1
15°–30°
S D c
L s
x
C
1
D c
V
X
R
D w
D s
D w
E
Detail X
Optional Point Construction
R
Fillet
15°–30°
Property Class and Manu- facturer’s Identification to Appear on Top of Head
Width Across Flats, S
Bearing Circle Dia., D w
Flange Edge Thickness, C
Head Height, K
Fillet Radius, R
Width Across Corners, E
Flange Dia., D c
Wrenching Height K 1
Nominal Screw Dia., D , and Thread Pitch
Body Dia., D s
Max. Min. Max. Min. Max. Min. 10.00 9.78 15.00 14.57 17.32 16.32 22.3 Max.
Min. 19.6 23.8 27.6 31.9 39.9
Min.
Max. 10.4 11.8 13.7 15.4 18.9
Min.
Max.
1.5 1.8 2.1 2.4
4.6 5.2 6.3 7.1 8.8
0.6 0.7 0.9 1.0
M10 × 1.5
M12 × 1.75 12.00 11.73 18.00 17.57 20.78 19.68 26.6 14.00 13.73 21.00 20.16 24.25 22.58 30.5
M14 × 2 M16 × 2 M20 × 2.5
16.00 15.73 24.00 23.16 27.71 25.94 35.0 20.00 19.67 30.00 29.16 34.64 32.66 43.0
3.0 1.2 All dimensions are in millimeters. Basic thread lengths, B , are as given in Table 13. Transition thread length, x , includes the length of incomplete threads and toler ances on grip gaging length and body length. It is intended for calculation purposes. For additional manufacturing and acceptance specifications, reference should be made to ANSI/ASME B18.2.3.9M-2001 (R2014) standard.
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