As I remember way back when it was something like (2 ( 2 x lead dia)) + (max 
body)
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>From: DesignerCouncil-request
>To: DesignerCouncil
>Subject: DES: Axial Leaded Spacing
>Date: Monday, 01 April, 1996 7:25AM
>
>     I have been using SMT for so long, I forgot the rule of thumb for
>determining the lead-lead spacing for axial leaded resistors.  Isn't
>there an equation that is used?  Any help would be appreciated.  Thanks,
>
>Mark R. Peltier
>e-mail:[log in to unmask]
>
>