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: Flange Spreader Parts
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Sumner 774080 PIN, ROLL
Vendor:SumnerRegular price $0.56Regular priceUnit price / per -
Sumner 784051 1-1/4 PIN WLDMT
Vendor:SumnerRegular price $48.14Regular priceUnit price / per -
Sumner 784047 5/8" PIN WLDMT
Vendor:SumnerRegular price $28.27Regular priceUnit price / per -
Sumner 784045 3/4" PIN WLDMT
Vendor:SumnerRegular price $25.89Regular priceUnit price / per -
Sumner 784042 7/8" PIN WLDMT
Vendor:SumnerRegular price $46.40Regular priceUnit price / per -
Sumner 784041 1" PIN WLDMT
Vendor:SumnerRegular price $40.21Regular priceUnit price / per -
Sumner 784031 WEDGE, HYDRUALIC
Vendor:SumnerRegular price $224.67Regular priceUnit price / per -
Sumner 784030 PISTON CAP
Vendor:SumnerRegular price $58.05Regular priceUnit price / per -
Sumner 784029 LEG (MACHINE)
Vendor:SumnerRegular price $86.85Regular priceUnit price / per -
Sumner 784028 BASE (MACHINE)
Vendor:SumnerRegular price $383.33Regular priceUnit price / per -
Sumner 784025 FRAME WLDMT, FOR ST-303
Vendor:SumnerRegular price $220.38Regular priceUnit price / per -
Sumner 784024 SHORT 1-8 UNC SPREADER BOLT
Vendor:SumnerRegular price $45.62Regular priceUnit price / per -
Sumner 784023 LONG 1-8 SPREADER BOLT
Vendor:SumnerRegular price $43.11Regular priceUnit price / per -
Sumner 784021 FRAME WLDMT, FOR ST-304
Vendor:SumnerRegular price $145.22Regular priceUnit price / per -
Sumner 784019 FRAME WLDMT, FOR ST-302
Vendor:SumnerRegular price $137.48Regular priceUnit price / per -
Sumner 784017 FRAME WLDMT, FOR ST-301
Vendor:SumnerRegular price $208.88Regular priceUnit price / per -
Sumner 784014 WEDGE, SMALL #28
Vendor:SumnerRegular price $96.29Regular priceUnit price / per -
Sumner 784012 WEDGE, LARGE #29
Vendor:SumnerRegular price $111.41Regular priceUnit price / per -
Sumner 777000 CYLINDER, HYDRAULIC
Vendor:SumnerRegular price $949.14Regular priceUnit price / per -
Sumner 775111 2.24 SPLIT RING
Vendor:SumnerRegular price $5.03Regular priceUnit price / per -
Sumner 774057 PIN, HITCH
Vendor:SumnerRegular price $5.32Regular priceUnit price / per -
Sumner 774056 HAIRPIN
Vendor:SumnerRegular price $3.09Regular priceUnit price / per -
Sumner 773070 WASHER, FLAT 3/4 N, TYP A
Vendor:SumnerRegular price $11.03Regular priceUnit price / per -
Sumner 771230 SCREW, SHC 3/8-16 X 3/4
Vendor:SumnerRegular price $2.62Regular priceUnit price / per