This part is a replacement for the Lightweight non-locking SPRL fuel cap with threaded flange (05-28666).
Cap: 65mm O/D
G/S flange: 82mm O/D
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.
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This measures out to 2.325".
This is the replacement flange to the cap P/N# 05-28666.
The thread is 18 TPI UNC