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Smith Cooper 150# Black Malleable Iron 1/4 in. Banded Coupling Pipe Fittings - Threaded - John M. Ellsworth Co. Inc.
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Crouse-Hinds 191 3/4" Threaded 3pc Rigid/IMC Conduit Coupling, Concrete Tight, Malleable Iron | Cooper Electric
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Pipe Fittings Direct. 4 inch NPT mechant steel full coupling, Class 150, Internal Thread X Internal Thread
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13DPSB1S SB1 Threaded Coupling (Standard), 1-1/4″ NPT (1-1/4″ Gasket ID), (Carbon Steel) - Sandblast Solutions Inc
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Horiznext 3/4 npt Stainless Steel fitting, home brew adapter female threaded pipe cast coupling for plumbing tubing shower hose water heating extender: Amazon.com: Industrial & Scientific
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Proline Series 3/4-in x 1/2-in Threaded Coupling Fitting in the Brass Fittings department at Lowes.com
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