$2.78
Cast Iron Jaw Coupling Hub, Style L050, 1/4" Bore Diameter, No KeywayGlobal Industrial$0.48
Sigma ProConnex 1/2-in EMT Set Screw Coupling Conduit Fittings - Die Cast Zinc - UL Listed - Indoor/Concrete-Tight - 1 Pack | 49240Lowe's$0.85
Sigma ProConnex 1/2-in Die Cast Zinc Compression Coupling Conduit Fittings - Connects 2 Lengths of EMT Conduit, UL Listed | 49260Lowe's$5.59and up
Sigma Engineered Solutions ProConnex 3/4 in. D Die-Cast Zinc Compression Coupling For EMT 5 pkAce Hardware & 1 more$4.28
Halex 1/2-in Electrical (EMT) Die Cast Zinc Set Screw Coupling Conduit Fittings (10-Pack) | 21221Lowe's$3.48
Sigma ProConnex 3/4-in Electrical (EMT) Die Cast Zinc Set Screw Coupling Conduit Fittings (5-Pack) | 44241Lowe's$30.35
4" x 4" ProFlex Coupling (Cast Iron to Copper)AmazonSAVE $1.42
$19.24$20.66
2" x 2" ProFlex Coupling (Cast Iron, PVC, Steel to Copper)Amazon$16.39
ZORO SELECT 222138 Reducing Coupling,Cast Iron,2 x 1 1/2 inZoro.com$9.17
1" Die Cast Zinc CouplingAmazon$6.33
Shielded 3 in. Steel Transition Coupling Connects Cast Iron to Plastic Extra Heavy Cast IronThe Home Depot$5.66
Shielded 2 in. Steel Transition Coupling Connects Cast Iron Plastic or 2 in. Plastic to SteelThe Home Depot$14.85
Fernco PROFLEX P3001-215 Shielded Pipe Coupling for Cast Iron, Plastic, or Steel to Copper Plumbing ConnectionsAmazon$13.99
1/2" Pipe Fitting Coupling, Home TZH 10 Pack 1/2" Malleable Iron Cast Pipe Coupling for Steam-punk Vintage Shelf Bracket DIY Plumbing Pipe Decor Furniture (10, 1/2")Amazon$19.99
3/4" Pipe Fitting Coupling, Home TZH 20 Pack 3/4" Malleable Iron Cast Pipe Coupling for Steam-punk Vintage Shelf Bracket DIY Plumbing Pipe Decor Furniture (20, 3/4")Amazon$9.27
Shielded 4 in. Cast Iron Transition Coupling Connects CopperThe Home Depot