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T TANYA HARDWARE Pipe Fitting and Air Hose Fitings, Hex Nipple Coupling Set - 1/4-Inch NPT x 1/4-Inch NPT,Solid Brass, Female Pipe- 10 Piece - Amazon.com
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Pipe Fitting Connector Straight Hex Nipple Coupling 3/8 PT Female Thread Hydraulic Adapter 4 pcs - Walmart.com
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Amazon.com: TAISHER 304 Stainless Steel Pipe Fitting, Hex Nipple, Coupling, 3/8 x 3/8 NPT Male Thread Pipe, 3/8 x 3/8 NPT Female Thread Pipe : Industrial & Scientific
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Dixon Valve & Coupling - Combination Nipples For Hoses; Type: Threaded Nipple; Material: Stainless Steel; Thread Standard: Male NPT - 81100430 - MSC Industrial Supply
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Dixon Valve & Coupling - 1″ Pipe ID, Threaded Combination Nipple for Hoses - 48442990 - MSC Industrial Supply
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