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.
Collection: Hold Down Device Parts
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Sumner 781055 ADJ.NUT & HANDLE ASSY(H/D DEV)
Vendor:SumnerRegular price $110.40Regular priceUnit price / per -
Sumner 781054 ADJ.ROD & CHAIN ASSY.(H/D DEV)
Vendor:SumnerRegular price $94.55Regular priceUnit price / per -
Sumner 781053 ADJ. ROD (HOLD DOWN DEV)
Vendor:SumnerRegular price $68.20Regular priceUnit price / per -
Sumner 781052 ADJ. NUT (HOLD DOWN DEV.)
Vendor:SumnerRegular price $75.11Regular priceUnit price / per -
Sumner 781051 BODY, HOLD-DOWN DEVICE
Vendor:SumnerRegular price $23.61Regular priceUnit price / per -
Sumner 779402 DOUBLE CLEVIS 1/4" HI-TEST
Vendor:SumnerRegular price $27.79Regular priceUnit price / per -
Sumner 779302 CHAIN, HIGH-TEST 1/4" GRD 43
Vendor:SumnerRegular price $10.55Regular priceUnit price / per -
Sumner 776083 RETAINER RING, EXT.IRR3100-98
Vendor:SumnerRegular price $2.79Regular priceUnit price / per -
Sumner 771345 SCREW, SHOULDER 5/16 X 3/4
Vendor:SumnerRegular price $3.47Regular priceUnit price / per