I could not find a Miller part so I called and was able to locate a hard to find part which they shipped and received in a few days.
Sumner 772355 NUT, INSERT LOCK 3/8-16
Sumner 772355 NUT, INSERT LOCK 3/8-16
Sumner Part Number 772355 as indicated in the BASE ASSEMBLY DIAGRAM.
NUT, INSERT LOCK 3/8-16
Manufacture: Sumner
Regular price
$3.17
Regular price
Sale price
$3.17
Unit price
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per