ASME B 18.6.3 - 2013 82° Slotted Undercut 82-deg Flat Countersunk Head Tapping Screws [Table 9]


Unit: inch
美标ASME B18.6.3 - 2013 ASME18.6.3 18.6.3A 82° Slotted Undercut 82-deg Flat Countersunk Head Tapping Screws  [Table 9]
Thread Size
d
0# 1# 2# 3# 4# 5# 6# 7# 8# 10# 12#
d Nominal Size
Series Symbol
L Type A & Type AB
Other Types
dk max
min
k max
min
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
●◆▲ ●◆▲ ●◆▲■ ●◆▲■ ●◆▲■ ●◆▲■ ●◆▲■ ●◆▲ ●◆▲■ ●◆▲■ ●◆▲■
3/16 3/16 3/16 7/32 1/4 1/4 5/16 3/8 7/16 1/2 9/16
1/8 5/32 3/16 7/32 1/4 1/4 5/16 3/8 7/16 1/2 9/16
0.112 0.137 0.162 0.187 0.212 0.237 0.262 0.287 0.312 0.362 0.412
0.096 0.120 0.144 0.167 0.191 0.215 0.238 0.262 0.285 0.333 0.380
0.025 0.031 0.036 0.042 0.047 0.053 0.059 0.064 0.070 0.081 0.092
0.018 0.023 0.028 0.033 0.038 0.043 0.048 0.053 0.058 0.068 0.078
0.023 0.026 0.031 0.035 0.039 0.043 0.048 0.048 0.054 0.060 0.067
0.016 0.019 0.023 0.027 0.031 0.035 0.039 0.039 0.045 0.050 0.056
0.011 0.014 0.016 0.019 0.022 0.024 0.027 0.030 0.032 0.037 0.043
0.007 0.009 0.011 0.012 0.014 0.016 0.017 0.019 0.021 0.024 0.028
Thread Size
d
14# 1/4 16# 18# 5/16 20# 24# 3/8 7/16 1/2
d Nominal Size
Series Symbol
L Type A & Type AB
Other Types
dk max
min
k max
min
n max
min
t max
min
0.2420 0.2500 0.2680 0.2940 0.3125 0.3200 0.3720 0.3750 0.4375 0.5000
●▲■ ●▲■ ▲■
5/8 5/8 11/16 3/4 13/16 13/16 7/8 / / /
/ 5/8 / / 5/8 / / 5/8 3/4 3/4
0.462 0.477 0.512 0.581 0.597 0.611 0.711 0.717 0.760 0.815
0.427 0.442 0.475 0.522 0.556 0.569 0.664 0.670 0.715 0.765
0.103 0.107 0.114 0.126 0.134 0.137 0.159 0.161 0.156 0.156
0.089 0.092 0.099 0.109 0.116 0.119 0.139 0.140 0.133 0.130
0.075 0.075 0.075 0.084 0.084 0.084 0.094 0.094 0.094 0.106
0.064 0.064 0.064 0.072 0.072 0.072 0.081 0.081 0.081 0.091
0.047 0.050 0.053 0.058 0.062 0.063 0.074 0.075 0.072 0.072
0.032 0.032 0.035 0.039 0.041 0.042 0.049 0.049 0.045 0.046
①,Edge of head may be rounded or flat.
②,Screws of these lengths and shorter shall have undercut heads.
③,● Type AB thread-forming , see table [Table 40]
◆ Type A thread-forming, see table [Table 42]
▲ Type B and BP thread forming, see table [Table 41]; Type BF and BT thread cutting, see table [Table 43]
■ Type C thread forming, see table [Table VI-1]; Type D, F, G and T thread cutting, see table [Table 44]; and Type TRS thread-rolling ,see table [Table 45]
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