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304 Stainless Steel BSP HEX LOCKNUT 1/2 Inch BSP Threaded Jam Nut with Groove for O-Ring BSP Lock Nut fits Fusti/Anvil and Other Fermenter/Boiler Spigots - Hobby Homebrew
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Amazon.com: AN 06 O-ring Boss Port Plug 6AN Hex Plugs Seal Nut Block Off Cap 9/16-18 Male Thread Aluminum Fuel Hose Fittngs Adapter with AN6 ORB : Everything Else
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Amazon.com: O-Ring Stainless Steel 304 Groove Cast 1/2" NPT Lock Nut Female Pipe Fitting : Industrial & Scientific
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