ASME B 18.6.4 - 1998 Cross Recessed Big Flat Head Self-Tapping Screws


Unit: inch
美标ASME B18.6.4 - 1998 ASME18.6.4 18.6.4A Cross Recessed Big Flat Head Self-Tapping Screws
Screw Thread
d
2# 3# 4# 5# 6# 8# 10# 1/4 5/16 3/8 7/16 1/2
PP
d Nominal Diameter
dk max
min
k max
min
M Ref.
t Ref.
N Ref.
Socket No.
Penetration depth max
min
56 48 40 40 32 32 24 20 18 16 14 13
0.0860 0.0990 0.1120 0.1250 0.1380 0.1640 0.1900 0.2500 0.3125 0.3750 0.4375 0.5000
0.194 0.226 0.257 0.289 0.321 0.384 0.448 0.573 0.698 0.823 0.948 1.073
0.180 0.211 0.241 0.272 0.303 0.364 0.425 0.546 0.666 0.787 0.907 1.028
0.053 0.061 0.069 0.078 0.086 0.102 0.118 0.150 0.183 0.215 0.248 0.280
0.044 0.051 0.059 0.066 0.074 0.088 0.103 0.133 0.162 0.191 0.221 0.250
0.098 0.104 0.106 0.122 0.152 0.166 0.182 0.256 0.346 0.376 0.408 0.438
0.050 0.058 0.060 0.076 0.072 0.086 0.102 0.130 0.180 0.214 0.244 0.276
0.018 0.018 0.018 0.019 0.027 0.029 0.030 0.033 0.059 0.063 0.068 0.072
1 1 1 1 2 2 2 3 4 4 4 4
0.052 0.059 0.062 0.078 0.073 0.088 0.104 0.126 0.173 0.206 0.237 0.268
0.034 0.042 0.044 0.060 0.048 0.063 0.079 0.101 0.148 0.182 0.212 0.243
①,Material
1)Tapping screws are normally fabricated
from carbon steel of high quality,such as AISI 1016, 1018, 1019, 1021, 1022, or
1024, either killed or capped but not rimmed.
2)also be made from corrosion resistant steel,
brass, monel, and aluminum alloys. The materials and
properties shall be as mutually agreed upon between
the manufacturer and purchaser.
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