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Metric Type Ill Square-Recessed Flat Countersunk Head Tapping Screws [Table 11]

ASME B 18.6.5M - 2000 (R2010)

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美标ASME B18.6.5M - 2000 (R2010) ASME18.6. Metric Type Ill Square-Recessed Flat Countersunk Head Tapping Screws [Table 11]
Screw Thread
d
ST2.9 ST3.5 ST4.2 ST4.8 ST5.5 ST6.3 ST8 ST9.5
P Pitch
ds max
min
dk max
min
k max
L1 max
min
r max
min
s Ref.
T Ref.
b min
Socket No.
t max
min
Type of Thread and Point
1 1.3 1.4 1.6 1.8 1.8 2.1 2.1
- - - - - - - -
- - - - - - - -
5.5 7.3 8.4 9.3 10.3 11.3 15.8 18.3
5.2 6.9 8 8.9 9.9 10.9 15.4 17.8
1.7 2.3 2.6 2.8 3 3.1 4.6 5.2
- - - - - - - -
- - - - - - - -
1.2 1.4 1.6 2 2.2 2.4 3.2 4
0.6 0.7 0.8 1 1.1 1.2 1.6 2
1.78 2.31 2.84 2.84 3.38 3.38 4.85 4.85
1.68 2.44 2.92 3.23 4.01 4.01 4.93 4.93
17 21 25 29 33 38 38 38
0 1S 2S 2R 3R 3R 4R 4R
0.97 1.4 1.61 1.91 2.42 2.42 2.54 2.54
0.71 1.01 1.21 1.52 2.03 2.03 2.15 2.15
AB,B,BF,BT AB,B,BF,BT AB,B,BF,BT AB,B,BF,BT AB,B,BF,BT AB,B,BF,BT AB,B,BF,BT AB,B,BF,BT
Screw Thread
d
M2.5 M3 M3.5 M4 M5 M6 M8 M10
P Pitch
ds max
min
dk max
min
k max
L1 max
min
r max
min
s Ref.
T Ref.
b min
Socket No.
t max
min
Type of Thread and Point
0.45 0.5 0.6 0.7 0.8 1 1.25 1.5
2.5 3 3.5 4 5 6 8 10
2.36 2.86 3.32 3.82 4.82 5.82 7.78 9..78
4.7 5.5 7.3 8.4 9.3 11.3 15.8 18.3
4.4 5.2 6.9 8 8.9 10.9 15.4 17.8
1.5 1.7 2.3 2.7 2.7 3.3 4.6 5
0.55 0.6 0.7 0.8 0.9 1.1 1.4 1.7
0.35 0.4 0.5 0.6 0.7 0.9 1.1 1.3
1 1.2 1.4 1.6 2 2.4 3.2 4
0.5 0.6 0.7 0.8 1 1.2 1.6 2
1.78 1.78 2.31 2.84 2.84 3.38 4.85 4.85
1.68 1.68 2.44 2.92 3.23 4.01 4.93 4.93
15 18 21 24 30 38 38 38
0 0 1S 2S 2R 3R 4R 4R
0.97 0.97 1.4 1.61 1.91 2.42 2.54 2.54
0.71 0.71 1.01 1.21 1.52 2.03 2.15 2.15
D,F,T D,F,T D,F,T D,F,T D,F,T D,F,T D,F,T D,F,T
①,Recessed head Types D, F, and T tapping screws shall have Style B head form. Recessed head Types AB, B, BF, and BT tapping screws shall have Style A head form. The underhead shoulder is mandatory on Style B head form, and all other head dimensions shall be common for both the Style A and Style B head forms.
②,S = short; R = regular

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