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ASME B18.8.1 Standard Dimensions for Cotter pins, inch series

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Clevis pins with head and hole

Dimensional Drawing and Technical Diagrams

1512_2817.jpg

Key Dimensions and Technical Parameters

Dimensions in inches - source ASME B 18.8.1

Pubblication date:1994
Nominal size or Basic Pin Diameter A B C D E F G H J M
max min max min max min ±0.01 max min max min nom max min ref min
3/16 (0.188) 0.186 0.181 0.32 0.30 0.07 0.05 0.02 0.088 0.073 0.15 0.14 0.58 0.504 0.484 0.09 0.440
1/4(0.250) 0.248 0.243 0.38

0.36

 0.10 0.08 0.03 0.088 0.073 0.21 0.20 0.77 0.692 0.672 0.09 0.628
5/16(0.312) 0.311 0.306 0.44 0.42 0.10 0.08 0.03 0.119 0.104 0.26 0.25 0.94 0.832 0.812 0.12 0.752
3/8(0.375) 0.373 0.368 0.51 0.49 0.13 0.11 0.03 0.119 0.104 0.33 0.32 1.06 0.958 0.938 0.12 0.878
7/6(0.438) 0.436 0.431 0.57 0.55 0.16 0.14 0.04 0.119 0.104 0.39 0.38 1.19 1.082 1.062 0.12 1.002
1/2(0.500) 0.496 0.461 0.63 0.61 0.16 0.14 0.04 0.151 0.136 0.44 0.43 1.36 1.223 1.203 0.15 1.127
5/8(0.625) 0.621 0.616 0.82 0.80 0.21 0.19 0.06 0.151 0.136 0.56 0.55 1.61 1.473 1.453 0.15 1.337

3/4(0.750)

 0.746 0.741 0.94 0.92 0.26 0.24 0.07 0.182 0.167 0.68 0.67 1.91 1.739 1.719 0.18 1.628
7/8(0.875) 0.871 0.866 1.04 1.02 0.32 0.30 0.09 0.182 0.167 0.80 0.79 2.16 1.989 1.969 0.18 1.878
1(1.000) 0.996 0.991 1.19 1.17 0.35 0.33 0.10 0.182 0.167 0.93 0.92 2.41 2.239 2.219 0.18 2.128

Reproduced by permission of DIN Deutsches Institut für Normung e. V. The definitive version for the implementation of this standard is the edition bearing the most recent date of issue, obtainable from Beuth Verlag GmbH, Burggrafenstraße 6, 10787 Berlin, Germany.
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