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ASME B18.8.2 Standard Dimensions for Grooved pins, Inch series

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Coiled spring pins shall have straigth cylindrical sides with both ends chamfered and coiled construction, multiple walls and are made in Standard, Heavy and Ligth duty series. Upon installation, the pin diameters contract and the spring reaction against the sides of the hole tends to retain the pin.

Dimensional Drawing and Technical Diagrams

1895_4128.jpg

Key Dimensions and Technical Parameters

Dimensions in inches - source ANSI B 18.2.2 table 2
Nominal size or pin basic diameter A pin diameter standard duty A pin diameter heavy duty A pin diameter ligth duty B chamfer diameter Recommended hole size F stock thickness
max min max min max max max max min basic
1/32 (0.031) 0.035 0.033 - - - 0.029 0.029 0.032 0.031 -
(0.039) 0.044 0.041 - - - 0.037 0.037 0.04 0.039 -
3/64 (0.047) 0.052 0.049 - - - 0.045 0.045 0.048 0.047 -
(0.052) 0.057 0.054 - - - 0.05 0.05 0.053 0.051 -
1/16 (0.062) 0.072 0.067 0.070 0.066 0.067 0.059 0.059 0.065 0.061 0.012
5/64 (0.076) 0.088 0.083 0.086 0.082 0.083 0.075 0.075 0.081 0.077 0.018
3/32 (0.094) 0.105 0.099 0.103 0.89 0.099 0.091 0.091 0.097 0.093 0.022
7/64 (0.109) 0.120 0.114 0.118 0.113 0.114 0.106 0.106 0.112 0.108 0.028
1/8 (0.125) 0.138 0.131 0.136 0.130 0.131 0.121 0.121 0.129 0.124 0.028
5/32 (0.156) 0.171 0.163 0.168 0.161 0.163 0.152 0.152 0.160 0.155 0.032
3/16 (0.188) 0.205 0.196 0.202 0.194 0.196 0.182 0.182 0.192 0.185 0.04
7/32 (0.219) 0.223 0.228 0.235 0.226 0.228 0.214 0.214 0.224 0.217 0.048
1/4 (0.25) 0.271 0.26 0.268 0.258 0.26 0.243 0.243 0.256 0.247 0.048
5/16 (0.312) 0.337 0.324 0.334 0.322 0.324 0.304 0.304 0.319 0.308 0.062
3/8 (0.375) 0.403 0.388 0.4 0.386 0.388 0.366 0.366 0.383 0.37 0.077
7/16 (0.438) 0.469 0.452 0.466 0.45 0.452 0.427 0.427 0.446 0.431 0.077
1/2 (0.500) 0.535 0.516 0.532 0.514 0.516 0.488 0.488 0.510 0.493 0.094
5/8 (0.625) 0.661 0.642 0.658 0.640 - 0.613 0.613 0.635 0.618 0.125
3/4 (0.75) 0.787 0.768 0.784 0.766 - 0.738 0.738 0.760 0.743 0.15

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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