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ASME/ANSI B18.6.3:2010 Countersunk Head Slotted Tapping Screw
ASME/ANSI B18.6.3:2010 80° Countersunk Head Slotted Tapping Screw uses the U.S. standard 80-degree countersunk head angle, making it suitable for North American drawings and export products that require flush installation in sheet materials.
The slotted drive maintains broad tool compatibility, while the tapping thread forms its mating thread directly in the pilot hole, reducing processing steps. The 80-degree head is designed to match corresponding countersunk holes for stable seating and a clean surface.
This product is suitable for electrical panels, metal covers, plastic housings, furniture hardware, and visible parts of light equipment. Material, head size, and protective coating options can be selected to meet assembly efficiency, appearance, and corrosion resistance requirements.
Unit: inch
|
Nominal diameter d |
dk |
k |
n |
t |
|||
|
max |
min |
max |
min |
max |
min |
||
|
#0 |
0.112 |
0.096 |
0.035 |
0.023 |
0.016 |
0.015 |
0.010 |
|
#1 |
0.137 |
0.120 |
0.043 |
0.026 |
0.019 |
0.019 |
0.012 |
|
#2 |
0.162 |
0.144 |
0.051 |
0.031 |
0.023 |
0.023 |
0.015 |
|
#3 |
0.187 |
0.167 |
0.059 |
0.035 |
0.027 |
0.027 |
0.017 |
|
#4 |
0.212 |
0.191 |
0.067 |
0.039 |
0.031 |
0.030 |
0.020 |
|
#5 |
0.237 |
0.215 |
0.075 |
0.043 |
0.035 |
0.034 |
0.022 |
|
#6 |
0.262 |
0.238 |
0.083 |
0.048 |
0.039 |
0.038 |
0.024 |
|
#7 |
0.287 |
0.262 |
0.091 |
0.048 |
0.039 |
0.041 |
0.027 |
|
#8 |
0.312 |
0.285 |
0.100 |
0.054 |
0.045 |
0.045 |
0.029 |
|
#10 |
0.362 |
0.333 |
0.116 |
0.060 |
0.050 |
0.053 |
0.034 |
|
#12 |
0.412 |
0.380 |
0.132 |
0.067 |
0.056 |
0.060 |
0.039 |
|
#14 |
0.462 |
0.427 |
0.148 |
0.075 |
0.064 |
0.068 |
0.044 |
|
1/4 |
0.477 |
0.442 |
0.153 |
0.075 |
0.064 |
0.070 |
0.046 |
|
#16 |
0.512 |
0.475 |
0.164 |
0.075 |
0.064 |
0.075 |
0.049 |
|
#18 |
0.561 |
0.522 |
0.180 |
0.084 |
0.072 |
0.083 |
0.054 |
|
5/16 |
0.597 |
0.556 |
0.191 |
0.084 |
0.072 |
0.088 |
0.058 |
|
#20 |
0.611 |
0.569 |
0.196 |
0.084 |
0.072 |
0.090 |
0.059 |
|
#24 |
0.711 |
0.664 |
0.228 |
0.094 |
0.081 |
0.105 |
0.069 |
|
3/8 |
0.717 |
0.670 |
0.230 |
0.094 |
0.081 |
0.106 |
0.070 |
|
7/16 |
0.760 |
0.715 |
0.223 |
0.094 |
0.081 |
0.103 |
0.066 |
|
1/2 |
0.815 |
0.765 |
0.223 |
0.106 |
0.091 |
0.103 |
0.065 |
Remarks: Thread and tail end form, refer to ASME B18.6.3-2010 AB, A, B, BP, BF, BT, D, F, G, T type thread and tail end
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