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ASME/ANSI B18.6.3:2010 Oval Countersunk Head Slotted Tapping Screw
ASME/ANSI B18.6.3:2010 80° Oval Countersunk Head Slotted Tapping Screw uses a U.S. standard oval countersunk head. The underside fits a countersunk hole while the rounded top provides a softer visible appearance, making it suitable for exposed assemblies.
The tapping thread allows direct installation in thin metal, plastic, and other light materials, while the slotted drive supports common-tool assembly. The 80-degree head angle matches corresponding countersinks and helps improve seating and positional stability.
This product is used in export appliances, control panels, furniture hardware, decorative covers, and light industrial products. Materials, coatings, and packaging specifications can be selected to meet end-market requirements, standardized supply, and after-sales service needs.
Unit: inch
|
Thread diameter |
dk |
k |
f |
n |
t |
||||
|
max |
min |
max |
min |
max |
min |
||||
|
#0 |
0.112 |
0.096 |
0.035 |
0.021 |
0.023 |
0.016 |
0.030 |
0.025 |
|
|
#1 |
0.137 |
0.120 |
0.043 |
0.025 |
0.026 |
0.019 |
0.038 |
0.031 |
|
|
#2 |
0.162 |
0.144 |
0.051 |
0.029 |
0.031 |
0.023 |
0.045 |
0.037 |
|
|
#3 |
0.187 |
0.167 |
0.059 |
0.033 |
0.035 |
0.027 |
0.052 |
0.043 |
|
|
#4 |
0.212 |
0.191 |
0.067 |
0.037 |
0.039 |
0.031 |
0.059 |
0.049 |
|
|
#5 |
0.237 |
0.215 |
0.075 |
0.041 |
0.043 |
0.035 |
0.067 |
0.055 |
|
|
#6 |
0.262 |
0.238 |
0.083 |
0.045 |
0.048 |
0.039 |
0.074 |
0.060 |
|
|
#7 |
0.287 |
0.262 |
0.091 |
0.049 |
0.048 |
0.039 |
0.081 |
0.066 |
|
|
#8 |
0.312 |
0.285 |
0.100 |
0.052 |
0.054 |
0.045 |
0.088 |
0.072 |
|
|
#10 |
0.362 |
0.333 |
0.116 |
0.060 |
0.060 |
0.050 |
0.103 |
0.084 |
|
|
#12 |
0.412 |
0.380 |
0.132 |
0.068 |
0.067 |
0.056 |
0.117 |
0.096 |
|
|
#14 |
0.462 |
0.427 |
0.148 |
0.076 |
0.075 |
0.064 |
0.132 |
0.108 |
|
|
1/4 |
0.477 |
0.442 |
0.153 |
0.079 |
0.075 |
0.064 |
0.136 |
0.112 |
|
|
#16 |
0.512 |
0.475 |
0.164 |
0.084 |
0.075 |
0.064 |
0.146 |
0.120 |
|
|
#18 |
0.561 |
0.522 |
0.180 |
0.092 |
0.084 |
0.072 |
0.160 |
0.132 |
|
|
5/16 |
0.597 |
0.556 |
0.191 |
0.099 |
0.084 |
0.072 |
0.171 |
0.141 |
|
|
#20 |
0.611 |
0.569 |
0.196 |
0.100 |
0.084 |
0.072 |
0.175 |
0.144 |
|
|
#24 |
0.711 |
0.664 |
0.228 |
0.116 |
0.094 |
0.081 |
0.204 |
0.168 |
|
|
3/8 |
0.717 |
0.670 |
0.230 |
0.117 |
0.094 |
0.081 |
0.206 |
0.170 |
|
|
7/16 |
0.760 |
0.715 |
0.223 |
0.122 |
0.094 |
0.081 |
0.210 |
0.174 |
|
|
1/2 |
0.815 |
0.765 |
0.223 |
0.131 |
0.106 |
0.091 |
0.216 |
0.176 |
|
Note: 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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