clinch allowance

Your right size rivet

Rivet length formula:

Combined material thickness of assembly + clinch allowance = rivet length

Chart of standard clinch allowances
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Rivet Shank Diameter                     .060”   .065”   .088”   .098”   1/8”   9/64”   5/32”   3/16”   7/32”   1/4”    5/16”     3/8”
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            Semi Tubular                      .032”   .032”   .045”   .055”   .062”   .093”   .093”   .110”   .140”  .156”   .187”    7/32”
Clinch           ____________________________________________________________________________________________
Allowance
                Deep Hole                       -            -        .062”   .078”   .093”   .125”   .125”   .156”   .175”   .187”   .210”      -
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Diameter of hole in assembly          .067”   .070”   .093”   .104”   .128”   .152”   .165”   .196”  15/64”  17/64”  21/64”  25/64” ______________________________________________________________________________

Drill Number                                    51        50         42        37       30        24      19          9     15/64”  17/64”   21/64”  25/64”
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