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Rounded 60° Countersunk Head
Also called 60° Raised Countersunk Head Imperial Sizes
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Large Solid Rivets for General Engineering Purposes - Not Boiler Rivets
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BS 275 : 1927 plate 2, Fig 6 Rounded 60° Countersunk Head
½ to 1¾ Inches Diameter - All Dimensions in Inches - Generally Mild Steel
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- - - Shank Diameter - - - |
Head Diameter |
Head Depth |
Depth of |
Setting |
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Nominal D |
& |
Tolerance |
A=1.5D |
B=0.433D |
Round C=0.201D |
Allowance S=0.484D |
1/2 |
0.500 |
0.484 / 0.531 |
0.750 |
0.217 |
0.101 |
0.242 |
9/16 |
0.563 |
0.547 / 0.594 |
0.844 |
0.244 |
0.113 |
0.272 |
5/8 |
0.625 |
0.609 / 0.656 |
0.938 |
0.271 |
0.126 |
0.303 |
11/16 |
0.688 |
0.672 / 0.719 |
1.031 |
0.298 |
0.138 |
0.333 |
3/4 |
0.750 |
0.734 / 0.781 |
1.125 |
0.325 |
0.151 |
0.363 |
13/16 |
0.813 |
0.797 / 0.844 |
1.219 |
0.352 |
0.163 |
0.393 |
7/8 |
0.875 |
0.859 / 0.906 |
1.313 |
0.379 |
0.176 |
0.424 |
15/16 |
0.938 |
0.922 / 0.969 |
1.406 |
0.406 |
0.188 |
0.454 |
1 |
1.000 |
0.984 / 1.031 |
1.500 |
0.433 |
0.201 |
0.484 |
1.1/16 |
1.063 |
1.047 / 1.094 |
1.594 |
0.460 |
0.214 |
0.514 |
1.1/8 |
1.125 |
1.109 / 1.156 |
1.688 |
0.487 |
0.226 |
0.545 |
1.3/16 |
1.188 |
1.172 / 1.219 |
1.781 |
0.514 |
0.239 |
0.575 |
1.1/4 |
1.250 |
1.234 / 1.281 |
1.875 |
0.541 |
0.251 |
0.605 |
1.5/16 |
1.313 |
1.297 / 1.344 |
1.969 |
0.568 |
0.264 |
0.635 |
1.3/8 |
1.375 |
1.359 / 1.406 |
2.063 |
0.595 |
0.276 |
0.666 |
1.7/16 |
1.438 |
1.422 / 1.469 |
2.156 |
0.622 |
0.289 |
0.696 |
1.1/2 |
1.500 |
1.484 / 1.531 |
2.250 |
0.650 |
0.302 |
0.726 |
1.9/16 |
1.563 |
1.547 / 1.594 |
2.344 |
0.677 |
0.314 |
0.756 |
1.5/8 |
1.625 |
1.609 / 1.656 |
2.438 |
0.704 |
0.327 |
0.787 |
1.11/16 |
1.688 |
1.672 / 1.719 |
2.531 |
0.731 |
0.339 |
0.817 |
1.3/4 |
1.750 |
1.734 / 1.781 |
2.625 |
0.758 |
0.352 |
0.847 |
The Britsh Standard does not specify tolerances for Head Diameter, Depth, Radius & Angle of Countersink or Shank Length. It is normal to have a radius under the head and at the periphery of the countersink, but no dimensions are specified.
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