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 Pan Head with Tapered Neck
  Also called Cone Head                                      Imperial Sizes

Large Pan Head Tapered Neck Rivet - schematic
 

  Large Solid Rivets for General Engineering Purposes - Not Boiler Rivets 

BS 275 : 1927   plate 2, Fig 5   Pan Head with Tapered Neck
½ to 1¾ Inches Diameter - All Dimensions in Inches - Generally Mild Steel

- - - Shank Diameter - - -

Depth of

Head Diameter 

Head Depth

Setting

  Nominal
  D

&
 

Tolerance
 

15° Taper
E=0.5D

 
   A=1.6D

 
B=0.7D

Allowance
S=1.273D

1/2

0.500

0.484 / 0.531

0.250

0.800

0.350

0.637

9/16

0.563

0.547 / 0.594

0.281

0.900

0.394

0.716

5/8

0.625

0.609 / 0.656

0.313

1.000

0.438

0.796

11/16

0.688

0.672 / 0.719

0.344

1.100

0.481

0.875

3/4

0.750

0.734 / 0.781

0.375

1.200

0.525

0.955

13/16

0.813

0.797 / 0.844

0.406

1.300

0.569

1.034

7/8

0.875

0.859 / 0.906

0.438

1.400

0.613

1.114

15/16

0.938

0.922 / 0.969

0.469

1.500

0.656

1.193

1

1.000

0.984 / 1.031

0.500

1.600

0.700

1.273

1.1/16

1.063

1.047 / 1.094

0.531

1.700

0.744

1.353

1.1/8

1.125

1.109 / 1.156

0.563

1.800

0.788

1.432

1.3/16

1.188

1.172 / 1.219

0.594

1.900

0.831

1.512

1.1/4

1.250

1.234 / 1.281

0.625

2.000

0.875

1.591

1.5/16

1.313

1.297 / 1.344

0.656

2.100

0.919

1.671

1.3/8

1.375

1.359 / 1.406

0.688

2.200

0.963

1.750

1.7/16

1.438

1.422 / 1.469

0.719

2.300

1.006

1.830

1.1/2

1.500

1.484 / 1.531

0.750

2.400

1.050

1.910

1.9/16

1.563

1.547 / 1.594

0.781

2.500

1.094

1.989

1.5/8

1.625

1.609 / 1.656

0.813

2.600

1.138

2.069

1.11/16

1.688

1.672 / 1.719

0.844

2.700

1.181

2.148

1.3/4

1.750

1.734 / 1.781

0.875

2.800

1.225

2.228

The Britsh Standard does not specify tolerances for Depth & Angle of Taper,
Head Diameter & Depth or Shank Length.
It is normal to have a radius under the head, but no dimensions are specified.