The guidelines below, provide some general information that can be used to determine the right length and clinch allowance for your application.  Naturally, our staff is always available to provide additional assistance.  All you have to do is call.

RIVET LENGTHS
All rivet lengths except countersunk head rivets are measured from the underside of the head to the end of the shank.  In applications involving countersunk head rivets, overall length is measured from the top of the head to the end of the shank. Length under head must also be specified.

Example:  If a semi-tubular rivet of 1/8" dia. has been selected, the length should be established as follows: Combined Material Thickness   .125 Clinch Allowance   .062 Rivet Length   .187 = 3/16" Long

CHART OF STANDARD CLINCH ALLOWANCES
As a guide in determining proper rivet length, Chicago Rivet engineers have compiled a chart of Standard Clinch Allowances for the most popular rivet diameters.  The term "clinch allowance" applies to the part of the rivet extending beyond the material thickness of the assembly. (See illustration above.)  The listed clinch allowances are considered minimum.  To determine rivet length, add combined material thickness and clinch allowance, then use the next highest applicable increment.  Rivets with body
diameters from .060 to .098 are available in 1/64" length increments; 1/8" and larger diameters in 1/32" length increments.
Caution: While long usage proves it generally satisfactory, this chart should be used as a guide only. Before recording the rivet length permanently, rivet and test a sample assembly.  Certain assembly materials and various other conditions often cause a deviation from the established standard clinch allowances.