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Unit:inch

Slotted Flat Countersunk Head Tapping Screws - Type AB

ASME B 18.6.4 - 1998 (R2005)

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美标ASME B18.6.4 - 1998 (R2005) ASME18.6.4 Slotted Flat Countersunk Head Tapping Screws - Type AB
Nominal Diameter
d
0# 1# 2# 3# 4# 5# 6# 7# 8# 10# 12# 1/4 5/16
d Nominal Size
L min
dk max
min
k Ref.
n max
min
t max
min
0.0600 0.0730 0.0860 0.0990 0.1120 0.1250 0.1380 0.1510 0.1640 0.1900 0.2160 0.2500 0.3125
3/16 3/16 3/16 7/32 1/4 1/4 5/16 3/8 7/16 1/2 9/16 5/8 13/16
0.112 0.137 0.162 0.187 0.212 0.237 0.262 0.287 0.312 0.362 0.412 0.477 0.597
0.096 0.120 0.144 0.167 0.191 0.215 0.238 0.262 0.285 0.333 0.380 0.442 0.556
0.035 0.043 0.051 0.059 0.067 0.075 0.083 0.091 0.100 0.116 0.132 0.153 0.191
0.023 0.026 0.031 0.035 0.039 0.043 0.048 0.048 0.054 0.060 0.067 0.075 0.084
0.016 0.019 0.023 0.027 0.031 0.035 0.039 0.039 0.045 0.050 0.056 0.064 0.072
0.015 0.019 0.023 0.027 0.030 0.034 0.038 0.041 0.045 0.053 0.060 0.070 0.088
0.010 0.012 0.015 0.017 0.020 0.022 0.024 0.027 0.029 0.034 0.039 0.046 0.058
①,Screws of these lengths and shorter shall have undercut heads as shown in tabulation.
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