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ASME/ANSI B18.6.3:2010 Countersunk Head Slotted Screw
ASME/ANSI B18.6.3:2010 Countersunk Head Slotted Screw combines a slotted drive with a countersunk head, making it suitable for fastening points that require reliable clamping, removable maintenance, and standardized assembly. The ASME/ANSI framework suits U.S.-standard projects, export equipment, and cross-regional supply chains, supporting smooth alignment between engineering drawings, purchasing lists, and quality inspection.
From an assembly perspective, the slot is easy to identify and works with simple tools, which supports routine maintenance and manual assembly. At the same time, the tapered head seats into a prepared countersink, allowing the screw to sit flush or nearly flush with the surface, so the screw can provide stable fastening performance across different sheet thicknesses, appearance requirements, and space limitations.
It works well on flat surfaces, rails, covers, module housings, and areas where snagging or interference should be avoided. It can be supplied in carbon steel, alloy steel, stainless steel, and other materials, with zinc plating, nickel plating, black oxide, phosphating, or other finishes to balance corrosion resistance, appearance, and assembly friction.
Unit: inch
|
Thread size d |
dk |
k Nominal |
n |
t |
|||
|
max |
min |
max |
min |
max |
min |
||
|
#0 |
0.112 |
0.096 |
0.035 |
0.023 |
0.016 |
0.015 |
0.01 |
|
#1 |
0.137 |
0.12 |
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 |
0.03 |
0.02 |
|
#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 |
|
#8 |
0.312 |
0.285 |
0.1 |
0.054 |
0.045 |
0.045 |
0.029 |
|
#10 |
0.362 |
0.333 |
0.116 |
0.06 |
0.05 |
0.053 |
0.034 |
|
#12 |
0.412 |
0.38 |
0.132 |
0.067 |
0.056 |
0.06 |
0.039 |
|
1/4 |
0.477 |
0.442 |
0.153 |
0.075 |
0.064 |
0.07 |
0.046 |
|
5/16 |
0.597 |
0.556 |
0.191 |
0.084 |
0.072 |
0.088 |
0.058 |
|
3/8 |
0.717 |
0.67 |
0.23 |
0.094 |
0.081 |
0.106 |
0.07 |
|
1/2 |
0.815 |
0.765 |
0.223 |
0.106 |
0.091 |
0.103 |
0.065 |
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