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IFI 148-7-2002
Flat round head with rings on undertake surface welding screws-Table 7
Nom
P
dk max
dk min
d1 max
d1 min
k max
k min
k1 max
k1 min
d0 max
d0 min
h max
h min
d2
r max
#2
56
0.2
0.18
0.17
0.15
0.036
0.026
0.005
0.002
0.035
0.025
0.016
0.012
0.1
0.01
#4
40
0.25
0.23
0.215
0.195
0.036
0.026
0.006
0.003
0.045
0.035
0.017
0.013
0.13
0.015
#6
32
0.31
0.29
0.27
0.25
0.046
0.036
0.007
0.004
0.055
0.045
0.022
0.018
0.17
0.02
#8
32
0.35
0.33
0.305
0.285
0.052
0.042
0.008
0.005
0.065
0.055
0.027
0.023
0.19
0.025
#10
24
0.4
0.38
0.35
0.331
0.068
0.058
0.009
0.006
0.075
0.065
0.032
0.028
0.22
0.03
1/4
20
0.51
0.485
0.455
0.43
0.083
0.073
0.01
0.007
0.095
0.085
0.042
0.038
0.282
0.04
5/16
18
0.635
0.61
0.57
0.545
0.099
0.089
0.012
0.008
0.125
0.115
0.047
0.043
0.312
0.045
3/8
16
0.76
0.735
0.69
0.665
0.114
0.104
0.013
0.009
0.145
0.135
0.052
0.048
0.375
0.05
1/2
13
0.945
0.915
0.87
0.845
0.146
0.136
0.014
0.01
0.175
0.165
0.062
0.058
0.5
0.06
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