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slotted Oval Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table 20]

ASME B 18.6.4 - 1998

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美标ASME B18.6.4 - 1998 ASME18.6.4 18.6.4A slotted Oval Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table 20]
Nominal Diameter
d
0# 1# 2# 3# 4# 5# 6# 7#
d Nominal Size
L min
dk max
min
k Ref.
f Ref.
h Ref.
n max
min
t max
min
0.0600 0.0730 0.0860 0.0990 0.1120 0.1250 0.1380 0.1510
1/8 5/32 3/16 7/32 1/4 1/4 5/16 3/8
0.112 0.137 0.162 0.187 0.212 0.237 0.262 0.287
0.096 0.120 0.144 0.167 0.191 0.215 0.238 0.262
0.035 0.043 0.051 0.059 0.067 0.075 0.083 0.091
0.021 0.025 0.029 0.033 0.037 0.041 0.045 0.049
0.056 0.068 0.080 0.092 0.104 0.116 0.128 0.140
0.023 0.026 0.031 0.035 0.039 0.043 0.048 0.048
0.016 0.019 0.023 0.027 0.031 0.035 0.039 0.039
0.030 0.038 0.045 0.052 0.059 0.067 0.074 0.081
0.025 0.031 0.037 0.043 0.049 0.055 0.060 0.066
Nominal Diameter
d
8# 10# 12# 1/4 5/16 3/8 7/16 1/2
d Nominal Size
L min
dk max
min
k Ref.
f Ref.
h Ref.
n max
min
t max
min
0.1640 0.1900 0.2160 0.2500 0.3125 0.3750 0.4375 0.5000
7/16 1/2 9/16 5/8 5/8 5/8 3/4 3/4
0.312 0.362 0.412 0.477 0.597 0.717 0.760 0.815
0.285 0.333 0.380 0.442 0.556 0.670 0.715 0.765
0.100 0.116 0.132 0.153 0.191 0.230 0.223 0.223
0.052 0.060 0.068 0.079 0.099 0.117 0.122 0.131
0.152 0.176 0.200 0.232 0.290 0.347 0.345 0.354
0.054 0.060 0.067 0.075 0.084 0.094 0.094 0.106
0.045 0.050 0.056 0.064 0.072 0.081 0.081 0.091
0.088 0.103 0.117 0.136 0.171 0.206 0.210 0.216
0.072 0.084 0.096 0.112 0.141 0.170 0.174 0.176

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