Table 4. American National Standard Slotted and Cross and Square Recessed Pan Head Metric Machine Screws ANSI/ASME B18.6.7M-1999 (Withdrawn)
W
T
R D S
N
R 1
D A
B
D K
K
L
Cross and Square Recess
Slotted
Nominal Screw Size and Thread Pitch
D s
D K
K
R 1
K
R 1
D A
R
N
T
W
Underhead Fillet
Unslotted Head Thickness
Body Diameter
Head Diameter
Head Height
Head Radius Max.
Head Height
Head Radius
Transition Dia.
Slot Width
Slot Depth Min.
Radius Min.
Max. 2.00 2.50 3.00 3.50 4.00 5.00 6.00 8.00 10.00
Min. 1.65 2.12 2.58 3.00 3.43 4.36 5.21 7.04 8.86
Max.
Min.
Max.
Min.
Max.
Min.
Ref. 3.2 4.0 5.0
Max.
Max.
Min.
Min.
4.0 5.0 5.6 7.0
3.7 4.7 5.3 6.6
1.3 1.5 1.8 2.1 2.4 3.0 3.6 4.8 6.0
1.1 1.3 1.6 1.9 2.2 2.7 3.3 4.5 5.7
0.8 1.0 1.2 1.4 1.6 2.0 2.5 3.2 4.0
1.6 2.1 2.4 2.6 3.1 3.7 4.6 6.0 7.5
1.4 1.9 2.2 2.3 2.8 3.4 4.3 5.6 7.1
2.6 3.1 3.6 4.1 4.7 5.7 6.8 9.2
0.1 0.1 0.1 0.1 0.2 0.2 0.3 0.4 0.4
0.7 0.8 1.0 1.2 1.5 1.5 1.9 2.3 2.8
0.5 0.6 0.8 1.0 1.2 1.2 1.6 2.0 2.5
0.5 0.6 0.7 0.8 1.0 1.2 1.4 1.9 2.4
0.4 0.5 0.7 0.8 0.9 1.2 1.4 1.9 2.4
M2 × 0.4 a M2.5 × 0.45 M3 × 0.5 M3.5 × 0.6 M4 × 0.7 M5 × 0.8 M6 × 1 M8 × 1.25 M10 × 1.5
6.0 6.5 8.0
8.0 9.5 12.0 16.0 20.0
7.6 9.1 11.5 15.5 19.4
10.0 13.0 16.0
11.2
a This size not specified for Type III square recessed pan 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 6.
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